diff --git a/InventoryDefaultForCountrySourceSelection/Model/Algorithms/DefaultForCountryAlgorithm.php b/InventoryDefaultForCountrySourceSelection/Model/Algorithms/DefaultForCountryAlgorithm.php
new file mode 100644
index 000000000000..7eb0f653c391
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Model/Algorithms/DefaultForCountryAlgorithm.php
@@ -0,0 +1,169 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Model\Algorithms;
+
+use Magento\Framework\Exception\InputException;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\InventoryApi\Api\Data\SourceInterface;
+use Magento\InventoryApi\Api\GetSourcesAssignedToStockOrderedByPriorityInterface;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Configuration;
+use Magento\InventorySourceSelectionApi\Api\Data\AddressInterface;
+use Magento\InventorySourceSelectionApi\Api\Data\InventoryRequestInterface;
+use Magento\InventorySourceSelectionApi\Api\Data\SourceSelectionResultInterface;
+use Magento\InventorySourceSelectionApi\Api\SourceSelectionServiceInterface;
+use Magento\InventorySourceSelectionApi\Model\Algorithms\Result\GetDefaultSortedSourcesResult;
+use Magento\InventorySourceSelectionApi\Model\SourceSelectionInterface;
+
+/**
+ * This shipping algorithm just iterates over all the sources one by one in distance order
+ */
+class DefaultForCountryAlgorithm implements SourceSelectionInterface
+{
+    /**
+     * Algorithm code
+     */
+    public const CODE = 'default_for_countries';
+
+    /**
+     * @var GetSourcesAssignedToStockOrderedByPriorityInterface
+     */
+    private $getSourcesAssignedToStockOrderedByPriority;
+
+    /**
+     * @var GetDefaultSortedSourcesResult
+     */
+    private $getDefaultSortedSourcesResult;
+
+    /**
+     * @var Configuration
+     */
+    private $configuration;
+
+    /**
+     * @var SourceSelectionServiceInterface
+     */
+    private $sourceSelectionService;
+
+    /**
+     * DefaultForCountryAlgorithm constructor.
+     *
+     * @param GetSourcesAssignedToStockOrderedByPriorityInterface $getSourcesAssignedToStockOrderedByPriority
+     * @param GetDefaultSortedSourcesResult $getDefaultSortedSourcesResult
+     * @param Configuration $configuration
+     * @param SourceSelectionServiceInterface $sourceSelectionService
+     */
+    public function __construct(
+        GetSourcesAssignedToStockOrderedByPriorityInterface $getSourcesAssignedToStockOrderedByPriority,
+        GetDefaultSortedSourcesResult $getDefaultSortedSourcesResult,
+        Configuration $configuration,
+        SourceSelectionServiceInterface $sourceSelectionService
+    ) {
+        $this->getSourcesAssignedToStockOrderedByPriority = $getSourcesAssignedToStockOrderedByPriority;
+        $this->getDefaultSortedSourcesResult = $getDefaultSortedSourcesResult;
+        $this->configuration = $configuration;
+        $this->sourceSelectionService = $sourceSelectionService;
+    }
+
+    /**
+     * @inheritdoc
+     * @throws LocalizedException
+     */
+    public function execute(InventoryRequestInterface $inventoryRequest): SourceSelectionResultInterface
+    {
+        $destinationAddress = $inventoryRequest->getExtensionAttributes()->getDestinationAddress();
+        if ($destinationAddress === null) {
+            throw new LocalizedException(__('No destination address was provided in the request'));
+        }
+
+        $stockId = $inventoryRequest->getStockId();
+        $sortedSources = $this->getEnabledSourcesOrderedByDefaultForCountriesByStockId(
+            $stockId,
+            $destinationAddress,
+            $inventoryRequest
+        );
+
+        return $this->getDefaultSortedSourcesResult->execute($inventoryRequest, $sortedSources);
+    }
+
+    /**
+     * Get enabled sources ordered by countries and fallback algorithm by $stockId
+     *
+     * @param int $stockId
+     * @param AddressInterface $address
+     * @param InventoryRequestInterface $inventoryRequest
+     * @return array
+     * @throws InputException
+     * @throws LocalizedException
+     */
+    private function getEnabledSourcesOrderedByDefaultForCountriesByStockId(
+        int $stockId,
+        AddressInterface $address,
+        InventoryRequestInterface $inventoryRequest
+    ): array {
+        $priorityBySourceCode = $sortSources = $sourcesFromAdditional = [];
+
+        $additionalAlgorithmCode = $this->configuration->getAdditionalAlgorithmCode();
+        if (!empty($additionalAlgorithmCode)) {
+            $additionalAlgorithmResult = $this->sourceSelectionService->execute(
+                $inventoryRequest,
+                $additionalAlgorithmCode
+            );
+            $sourceSelectionItemsFromAdditional = $additionalAlgorithmResult->getSourceSelectionItems();
+            $i = 1;
+            foreach ($sourceSelectionItemsFromAdditional as $sourceSelectionItem) {
+                $sourcesFromAdditional[$sourceSelectionItem->getSourceCode()] = $i++;
+            }
+        }
+
+        // Keep priority order as computational base
+        $sources = $this->getSourcesAssignedToStockOrderedByPriority->execute($stockId);
+        $sources = array_filter($sources, function (SourceInterface $source) {
+            return $source->isEnabled();
+        });
+
+        $isExcludeUnmatchedEnabled = $this->configuration->isExcludeUnmatchedEnabled();
+        $defaultSortOrder = count($sourcesFromAdditional) + count($sources);
+        foreach ($sources as $source) {
+            // Keep default sort order big, so source from default for countries can be pushed to start of array
+            $sortOrder = $defaultSortOrder;
+            $defaultForCountries = $source->getExtensionAttributes()->getDefaultForCountries();
+
+            $countryMatchToSourceFlag = isset($defaultForCountries)
+                && in_array($address->getCountry(), $defaultForCountries);
+            if ($countryMatchToSourceFlag) {
+                // push default for country source to start of array
+                $sortOrder = 0;
+            }
+
+            if ($isExcludeUnmatchedEnabled && !$countryMatchToSourceFlag) {
+                continue;
+            }
+
+            if (isset($sourcesFromAdditional[$source->getSourceCode()])) {
+                // increase sort order based on sort order from additional algorithm
+                $sortOrder += $sourcesFromAdditional[$source->getSourceCode()];
+            }
+
+            $priorityBySourceCode[$source->getSourceCode()] = $sortOrder;
+            $sortSources[] = $source;
+        }
+
+        // Sort sources by priority
+        uasort(
+            $sortSources,
+            function (SourceInterface $a, SourceInterface $b) use ($priorityBySourceCode) {
+                $priorityA = $priorityBySourceCode[$a->getSourceCode()];
+                $priorityB = $priorityBySourceCode[$b->getSourceCode()];
+
+                return ($priorityA < $priorityB) ? -1 : 1;
+            }
+        );
+
+        return $sortSources;
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/Model/Configuration.php b/InventoryDefaultForCountrySourceSelection/Model/Configuration.php
new file mode 100644
index 000000000000..47fbc1521424
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Model/Configuration.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Model;
+
+use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Store\Model\ScopeInterface;
+use Magento\Store\Model\Store;
+
+/**
+ * Algorithm configuration
+ */
+class Configuration
+{
+    private const XML_PATH_ADDITIONAL_ALGORITHM =
+        'cataloginventory/source_selection_default_for_country/additional_algorithm';
+    private const XML_PATH_EXCLUDE_UNMATCHED =
+        'cataloginventory/source_selection_default_for_country/exclude_unmatched';
+
+    /**
+     * @var ScopeConfigInterface
+     */
+    private $scopeConfig;
+
+    /**
+     * Configuration constructor.
+     *
+     * @param ScopeConfigInterface $scopeConfig
+     */
+    public function __construct(
+        ScopeConfigInterface $scopeConfig
+    ) {
+        $this->scopeConfig = $scopeConfig;
+    }
+
+    /**
+     * Get additional algorithm code
+     *
+     * @param null|string|bool|int|Store $store
+     * @return string|null
+     */
+    public function getAdditionalAlgorithmCode($store = null): ?string
+    {
+        return $this->scopeConfig->getValue(
+            self::XML_PATH_ADDITIONAL_ALGORITHM,
+            ScopeInterface::SCOPE_STORE,
+            $store
+        );
+    }
+
+    /**
+     * Get exclude_unmatched config flag
+     *
+     * @param null|string|bool|int|Store $store
+     * @return bool
+     */
+    public function isExcludeUnmatchedEnabled($store = null): bool
+    {
+        return $this->scopeConfig->isSetFlag(
+            self::XML_PATH_EXCLUDE_UNMATCHED,
+            ScopeInterface::SCOPE_STORE,
+            $store
+        );
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/Model/Source/InitCountriesSelectionExtensionAttributes.php b/InventoryDefaultForCountrySourceSelection/Model/Source/InitCountriesSelectionExtensionAttributes.php
new file mode 100644
index 000000000000..f29f4cf1895a
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Model/Source/InitCountriesSelectionExtensionAttributes.php
@@ -0,0 +1,57 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Model\Source;
+
+use Magento\Framework\Api\ExtensionAttributesFactory;
+use Magento\Framework\DataObject;
+use Magento\InventoryApi\Api\Data\SourceInterface;
+
+/**
+ * Set store-pickup related source extension attributes
+ */
+class InitCountriesSelectionExtensionAttributes
+{
+    public const DEFAULT_FOR_COUNTRIES_KEY = 'default_for_countries';
+    /**
+     * @var ExtensionAttributesFactory
+     */
+    private $extensionAttributesFactory;
+
+    /**
+     * @param ExtensionAttributesFactory $extensionAttributesFactory
+     */
+    public function __construct(ExtensionAttributesFactory $extensionAttributesFactory)
+    {
+        $this->extensionAttributesFactory = $extensionAttributesFactory;
+    }
+
+    /**
+     * Set store-pickup related source extension attributes.
+     *
+     * @param SourceInterface $source
+     */
+    public function execute(SourceInterface $source): void
+    {
+        if (!$source instanceof DataObject) {
+            return;
+        }
+        $defaultForCountries = $source->getData(self::DEFAULT_FOR_COUNTRIES_KEY);
+        $defaultForCountries = (empty($defaultForCountries)) ? [] : explode(',', $defaultForCountries);
+        $extensionAttributes = $source->getExtensionAttributes();
+
+        if ($extensionAttributes === null) {
+            $extensionAttributes = $this->extensionAttributesFactory->create(SourceInterface::class);
+            /** @noinspection PhpParamsInspection */
+            $source->setExtensionAttributes($extensionAttributes);
+        }
+        if (!empty($defaultForCountries)) {
+            $extensionAttributes->setDefaultForCountries($defaultForCountries);
+        }
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/LoadCountriesSelectionGetListPlugin.php b/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/LoadCountriesSelectionGetListPlugin.php
new file mode 100644
index 000000000000..a4b12170f059
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/LoadCountriesSelectionGetListPlugin.php
@@ -0,0 +1,54 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Plugin\InventoryApi\SourceRepository;
+
+use Magento\InventoryApi\Api\Data\SourceSearchResultsInterface;
+use Magento\InventoryApi\Api\SourceRepositoryInterface;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Source\InitCountriesSelectionExtensionAttributes;
+
+/**
+ * Populate countries selection extension attribute when loading a list of sources.
+ */
+class LoadCountriesSelectionGetListPlugin
+{
+    /**
+     * @var InitCountriesSelectionExtensionAttributes
+     */
+    private $setExtensionAttributes;
+
+    /**
+     * @param InitCountriesSelectionExtensionAttributes $setExtensionAttributes
+     */
+    public function __construct(
+        InitCountriesSelectionExtensionAttributes $setExtensionAttributes
+    ) {
+        $this->setExtensionAttributes = $setExtensionAttributes;
+    }
+
+    /**
+     * Add extension attribute object to source items
+     *
+     * @param SourceRepositoryInterface $subject
+     * @param SourceSearchResultsInterface $sourceSearchResults
+     *
+     * @return SourceSearchResultsInterface
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function afterGetList(
+        SourceRepositoryInterface $subject,
+        SourceSearchResultsInterface $sourceSearchResults
+    ): SourceSearchResultsInterface {
+        $items = $sourceSearchResults->getItems();
+        array_walk(
+            $items,
+            [$this->setExtensionAttributes, 'execute']
+        );
+
+        return $sourceSearchResults;
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/LoadCountriesSelectionOnGetPlugin.php b/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/LoadCountriesSelectionOnGetPlugin.php
new file mode 100644
index 000000000000..0151b8f3f225
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/LoadCountriesSelectionOnGetPlugin.php
@@ -0,0 +1,50 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Plugin\InventoryApi\SourceRepository;
+
+use Magento\InventoryApi\Api\Data\SourceInterface;
+use Magento\InventoryApi\Api\SourceRepositoryInterface;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Source\InitCountriesSelectionExtensionAttributes;
+
+/**
+ * Populate store pickup extension attributes when loading single order.
+ */
+class LoadCountriesSelectionOnGetPlugin
+{
+    /**
+     * @var InitCountriesSelectionExtensionAttributes
+     */
+    private $setExtensionAttributes;
+
+    /**
+     * @param InitCountriesSelectionExtensionAttributes $setExtensionAttributes
+     */
+    public function __construct(
+        InitCountriesSelectionExtensionAttributes $setExtensionAttributes
+    ) {
+        $this->setExtensionAttributes = $setExtensionAttributes;
+    }
+
+    /**
+     * Add extension attribute object to source
+     *
+     * @param SourceRepositoryInterface $subject
+     * @param SourceInterface $source
+     *
+     * @return SourceInterface
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function afterGet(
+        SourceRepositoryInterface $subject,
+        SourceInterface $source
+    ): SourceInterface {
+        $this->setExtensionAttributes->execute($source);
+
+        return $source;
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/SaveCountriesSelectionPlugin.php b/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/SaveCountriesSelectionPlugin.php
new file mode 100644
index 000000000000..feeb27f18dcf
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Plugin/InventoryApi/SourceRepository/SaveCountriesSelectionPlugin.php
@@ -0,0 +1,50 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Plugin\InventoryApi\SourceRepository;
+
+use Magento\Framework\DataObject;
+use Magento\InventoryApi\Api\Data\SourceInterface;
+use Magento\InventoryApi\Api\SourceRepositoryInterface;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Source\InitCountriesSelectionExtensionAttributes;
+
+/**
+ * Set data to SourceInterface from its extension attributes to save these values to `inventory_source` DB table.
+ */
+class SaveCountriesSelectionPlugin
+{
+    /**
+     * Persist the default_for_countries attribute on Source save
+     *
+     * @param SourceRepositoryInterface $subject
+     * @param SourceInterface $source
+     * @return array
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function beforeSave(
+        SourceRepositoryInterface $subject,
+        SourceInterface $source
+    ): array {
+        if (!$source instanceof DataObject) {
+            return [$source];
+        }
+
+        $extensionAttributes = $source->getExtensionAttributes();
+
+        if ($extensionAttributes !== null) {
+            $defaultForCountries = $extensionAttributes->getDefaultForCountries();
+            if (!empty($defaultForCountries)) {
+                $source->setData(
+                    InitCountriesSelectionExtensionAttributes::DEFAULT_FOR_COUNTRIES_KEY,
+                    implode(',', $defaultForCountries)
+                );
+            }
+        }
+
+        return [$source];
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/README.md b/InventoryDefaultForCountrySourceSelection/README.md
new file mode 100644
index 000000000000..b5e224537282
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/README.md
@@ -0,0 +1,3 @@
+# InventoryDefaultForCountrySourceSelection module
+
+The `InventoryDefaultForCountrySourceSelection` module implements logic for default for countries source selection. Example, source based in Japan may be preferred by merchant for shipping even if another source based in China is a closer to customer.
diff --git a/InventoryDefaultForCountrySourceSelection/Test/Api/DefaultForCountrySSATest.php b/InventoryDefaultForCountrySourceSelection/Test/Api/DefaultForCountrySSATest.php
new file mode 100644
index 000000000000..627994335056
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/Test/Api/DefaultForCountrySSATest.php
@@ -0,0 +1,212 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelection\Test\Api;
+
+use Magento\Framework\Webapi\Rest\Request;
+use Magento\InventoryApi\Api\Data\SourceInterfaceFactory;
+use Magento\InventoryApi\Api\SourceRepositoryInterface;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Algorithms\DefaultForCountryAlgorithm;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Source\InitCountriesSelectionExtensionAttributes;
+use Magento\InventorySourceSelectionApi\Api\GetDefaultSourceSelectionAlgorithmCodeInterface;
+use Magento\TestFramework\Helper\Bootstrap;
+use Magento\TestFramework\TestCase\WebapiAbstract;
+
+/**
+ * Test default_for_countries algorithm
+ */
+class DefaultForCountrySSATest extends WebapiAbstract
+{
+    /**#@+
+     * Service constants
+     */
+    const RESOURCE_PATH = '/V1/inventory/source-selection-algorithm-result';
+    const SERVICE_NAME = 'inventorySourceSelectionApiSourceSelectionServiceV1';
+    /**#@-*/
+
+    /**
+     * @var GetDefaultSourceSelectionAlgorithmCodeInterface
+     */
+    private $defaultAlgorithmCode;
+
+    /**
+     * @var SourceRepositoryInterface
+     */
+    private $sourceRepository;
+
+    /**
+     * @var SourceInterfaceFactory
+     */
+    private $sourceFactory;
+
+    /**
+     * Test default for countries SSA with disabled exclude unmatched
+     *
+     * @magentoConfigFixture cataloginventory/source_selection_default_for_country/additional_algorithm priority
+     * @magentoConfigFixture cataloginventory/source_selection_default_for_country/exclude_unmatched 0
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/products.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/sources.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/stocks.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/stock_source_links.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/source_items.php
+     */
+    public function testDefaultForCountrySSA()
+    {
+        $countriesToTest = $this->getCountriesToTestData();
+        foreach ($countriesToTest as $countryCode => $sources) {
+            foreach ($sources as $sourceCode) {
+                $source = $this->sourceRepository->get($sourceCode);
+                $source->setData(
+                    InitCountriesSelectionExtensionAttributes::DEFAULT_FOR_COUNTRIES_KEY,
+                    $countryCode
+                );
+                $this->sourceRepository->save($source);
+            }
+        }
+
+        $expectedListOrder = [
+            'DE' => ['eu-2', 'eu-1'],
+            'FR' => ['eu-1', 'eu-2'],
+        ];
+        $wrongListOrder = [
+            'DE' => ['eu-1', 'eu-2'],
+            'FR' => ['eu-2', 'eu-1'],
+        ];
+        $this->assertSourceSelectionOrderLists($expectedListOrder, $wrongListOrder);
+    }
+
+    /**
+     * Test default for countries SSA with enabled exclude_unmatched config
+     *
+     * @magentoConfigFixture cataloginventory/source_selection_default_for_country/additional_algorithm priority
+     * @magentoConfigFixture cataloginventory/source_selection_default_for_country/exclude_unmatched 1
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/products.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/sources.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/stocks.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/stock_source_links.php
+     * @magentoApiDataFixture ../../../../vendor/magento/module-inventory-api/Test/_files/source_items.php
+     */
+    public function testDefaultForCountrySSAWithExcludeUnmatched()
+    {
+        $countriesToTest = $this->getCountriesToTestData();
+        foreach ($countriesToTest as $countryCode => $sources) {
+            foreach ($sources as $sourceCode) {
+                $source = $this->sourceRepository->get($sourceCode);
+                $source->setData(
+                    InitCountriesSelectionExtensionAttributes::DEFAULT_FOR_COUNTRIES_KEY,
+                    $countryCode
+                );
+                $this->sourceRepository->save($source);
+            }
+        }
+
+        $expectedListOrder = [
+            'DE' => ['eu-2'],
+            'FR' => ['eu-1'],
+        ];
+        $wrongListOrder = [
+            'DE' => ['eu-1', 'eu-2'],
+            'FR' => ['eu-2', 'eu-1'],
+        ];
+        $this->assertSourceSelectionOrderLists($expectedListOrder, $wrongListOrder);
+    }
+
+    /**
+     * @inheridoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->defaultAlgorithmCode = Bootstrap::getObjectManager()->get(
+            GetDefaultSourceSelectionAlgorithmCodeInterface::class
+        );
+        $this->sourceRepository = Bootstrap::getObjectManager()->get(
+            SourceRepositoryInterface::class
+        );
+        $this->sourceFactory = Bootstrap::getObjectManager()->get(
+            SourceInterfaceFactory::class
+        );
+    }
+
+    /**
+     * Call webapi service and assert order list
+     *
+     * @param array $expectedListOrder
+     * @param array $wrongListOrder
+     * @return void
+     */
+    private function assertSourceSelectionOrderLists(array $expectedListOrder, array $wrongListOrder): void
+    {
+        $countriesToTest = $this->getCountriesToTestData();
+        $inventoryRequest = [
+            'stockId' => 10,
+            'items' => [
+                [
+                    'sku' => 'SKU-1',
+                    'qty' => 1,
+                ],
+            ],
+            'extension_attributes' => [
+                'destination_address' => [
+                    'country' => 'DE',
+                    'postcode' => '45000',
+                    'street' => 'test street',
+                    'region' => 'Region',
+                    'city' => 'City',
+                ],
+            ],
+        ];
+
+        $algorithmCode = DefaultForCountryAlgorithm::CODE;
+        $requestData = [
+            'inventoryRequest' => $inventoryRequest,
+            'algorithmCode' => $algorithmCode,
+        ];
+
+        $serviceInfo = [
+            'rest' => [
+                'resourcePath' => self::RESOURCE_PATH,
+                'httpMethod' => Request::HTTP_METHOD_POST,
+            ],
+            'soap' => [
+                'service' => self::SERVICE_NAME,
+                'operation' => self::SERVICE_NAME . 'Execute',
+            ],
+        ];
+
+        foreach ($countriesToTest as $countryCode => $sources) {
+            $requestData['inventoryRequest']['extension_attributes']['destination_address']['country'] =
+                $countryCode;
+            $response = $this->_webApiCall($serviceInfo, $requestData);
+
+            $this->assertIsArray($response);
+            $this->assertNotEmpty($response);
+            $this->assertArrayHasKey('source_selection_items', $response);
+            $listByPriority = [];
+            foreach ($response['source_selection_items'] as $sourceSelectionItem) {
+                $this->assertIsArray($sourceSelectionItem);
+                $this->assertArrayHasKey('source_code', $sourceSelectionItem);
+                $listByPriority[] = $sourceSelectionItem['source_code'];
+            }
+            $this->assertEquals($expectedListOrder[$countryCode], $listByPriority);
+            $this->assertNotEquals($wrongListOrder[$countryCode], $listByPriority);
+        }
+    }
+
+    /**
+     * Countries to test data array
+     *
+     * @return array
+     */
+    private function getCountriesToTestData(): array
+    {
+        return [
+            'DE' => ['eu-2'],
+            'FR' => ['eu-1'],
+        ];
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/composer.json b/InventoryDefaultForCountrySourceSelection/composer.json
new file mode 100644
index 000000000000..d19efed422af
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/composer.json
@@ -0,0 +1,26 @@
+{
+    "name": "magento/module-inventory-default-for-country-source-selection",
+    "description": "N/A",
+    "require": {
+        "php": "~7.3.0||~7.4.0",
+        "magento/framework": "*",
+        "magento/module-store": "*",
+        "magento/module-inventory": "*",
+        "magento/module-inventory-api": "*",
+        "magento/module-inventory-source-selection-api": "*"
+    },
+    "type": "magento2-module",
+    "license": [
+        "OSL-3.0",
+        "AFL-3.0"
+    ],
+    "autoload": {
+        "files": [
+            "registration.php"
+        ],
+        "psr-4": {
+            "Magento\\InventoryDefaultForCountrySourceSelection\\": ""
+        }
+    },
+    "version": "1.2.0"
+}
diff --git a/InventoryDefaultForCountrySourceSelection/etc/config.xml b/InventoryDefaultForCountrySourceSelection/etc/config.xml
new file mode 100644
index 000000000000..a98e71e019d1
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/etc/config.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
+    <default>
+        <cataloginventory>
+            <source_selection_default_for_country>
+                <additional_algorithm>priority</additional_algorithm>
+                <exclude_unmatched>0</exclude_unmatched>
+            </source_selection_default_for_country>
+        </cataloginventory>
+    </default>
+</config>
diff --git a/InventoryDefaultForCountrySourceSelection/etc/db_schema.xml b/InventoryDefaultForCountrySourceSelection/etc/db_schema.xml
new file mode 100644
index 000000000000..249ab3cc690f
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/etc/db_schema.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
+    <table name="inventory_source">
+        <column xsi:type="text" name="default_for_countries" nullable="true"/>
+    </table>
+</schema>
diff --git a/InventoryDefaultForCountrySourceSelection/etc/db_schema_whitelist.json b/InventoryDefaultForCountrySourceSelection/etc/db_schema_whitelist.json
new file mode 100644
index 000000000000..72461d8fd75a
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/etc/db_schema_whitelist.json
@@ -0,0 +1,7 @@
+{
+    "inventory_source": {
+        "column": {
+            "default_for_countries": true
+        }
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelection/etc/di.xml b/InventoryDefaultForCountrySourceSelection/etc/di.xml
new file mode 100644
index 000000000000..872f1b1651f7
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/etc/di.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+
+    <type name="Magento\InventorySourceSelectionApi\Model\SourceSelectionService">
+        <arguments>
+            <argument name="sourceSelectionMethods" xsi:type="array">
+                <item name="default_for_countries"
+                      xsi:type="string">Magento\InventoryDefaultForCountrySourceSelection\Model\Algorithms\DefaultForCountryAlgorithm</item>
+            </argument>
+        </arguments>
+    </type>
+
+    <type name="Magento\InventorySourceSelectionApi\Model\GetSourceSelectionAlgorithmList">
+        <arguments>
+            <argument name="availableAlgorithms" xsi:type="array">
+                <item name="default_for_countries" xsi:type="array">
+                    <item xsi:type="const" name="code">Magento\InventoryDefaultForCountrySourceSelection\Model\Algorithms\DefaultForCountryAlgorithm::CODE</item>
+                    <item xsi:type="string" name="title" translatable="true">Default For Country Priority</item>
+                    <item xsi:type="string" name="description" translatable="true">Algorithm which provides Source Selections based on shipping address country from the source</item>
+                </item>
+            </argument>
+        </arguments>
+    </type>
+
+    <type name="Magento\InventoryApi\Api\SourceRepositoryInterface">
+        <plugin name="LoadCountriesSelectionGetListPlugin" type="Magento\InventoryDefaultForCountrySourceSelection\Plugin\InventoryApi\SourceRepository\LoadCountriesSelectionGetListPlugin"/>
+        <plugin name="LoadCountriesSelectionOnGetPlugin" type="Magento\InventoryDefaultForCountrySourceSelection\Plugin\InventoryApi\SourceRepository\LoadCountriesSelectionOnGetPlugin"/>
+        <plugin name="SaveCountriesSelectionPlugin" type="Magento\InventoryDefaultForCountrySourceSelection\Plugin\InventoryApi\SourceRepository\SaveCountriesSelectionPlugin"/>
+    </type>
+</config>
diff --git a/InventoryDefaultForCountrySourceSelection/etc/extension_attributes.xml b/InventoryDefaultForCountrySourceSelection/etc/extension_attributes.xml
new file mode 100644
index 000000000000..957f9dfc6106
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/etc/extension_attributes.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Api/etc/extension_attributes.xsd">
+    <extension_attributes for="Magento\InventoryApi\Api\Data\SourceInterface">
+        <attribute code="default_for_countries" type="string[]"/>
+    </extension_attributes>
+</config>
diff --git a/InventoryDefaultForCountrySourceSelection/etc/module.xml b/InventoryDefaultForCountrySourceSelection/etc/module.xml
new file mode 100644
index 000000000000..0de56300f798
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/etc/module.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
+    <module name="Magento_InventoryDefaultForCountrySourceSelection">
+        <sequence>
+            <module name="Magento_Framework" />
+            <module name="Magento_Store" />
+            <module name="Magento_Inventory" />
+            <module name="Magento_InventoryApi" />
+            <module name="Magento_InventorySourceSelectionApi" />
+        </sequence>
+    </module>
+</config>
diff --git a/InventoryDefaultForCountrySourceSelection/i18n/en_US.csv b/InventoryDefaultForCountrySourceSelection/i18n/en_US.csv
new file mode 100644
index 000000000000..0f1e3acb6bbf
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/i18n/en_US.csv
@@ -0,0 +1 @@
+"No destination address was provided in the request","No destination address was provided in the request"
diff --git a/InventoryDefaultForCountrySourceSelection/registration.php b/InventoryDefaultForCountrySourceSelection/registration.php
new file mode 100644
index 000000000000..c2a994694ed3
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelection/registration.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+\Magento\Framework\Component\ComponentRegistrar::register(
+    \Magento\Framework\Component\ComponentRegistrar::MODULE,
+    'Magento_InventoryDefaultForCountrySourceSelection',
+    __DIR__
+);
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/Model/Config/Source/AdditionalAlgorithms.php b/InventoryDefaultForCountrySourceSelectionAdminUi/Model/Config/Source/AdditionalAlgorithms.php
new file mode 100644
index 000000000000..806bae2e731a
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/Model/Config/Source/AdditionalAlgorithms.php
@@ -0,0 +1,59 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\InventoryDefaultForCountrySourceSelectionAdminUi\Model\Config\Source;
+
+use Magento\Framework\Data\OptionSourceInterface;
+use Magento\InventoryDefaultForCountrySourceSelection\Model\Algorithms\DefaultForCountryAlgorithm;
+use Magento\InventorySourceSelectionApi\Api\GetSourceSelectionAlgorithmListInterface;
+
+/**
+ * System config source with available additional algorithms.
+ */
+class AdditionalAlgorithms implements OptionSourceInterface
+{
+
+    /**
+     * @var GetSourceSelectionAlgorithmListInterface
+     */
+    private $getSourceSelectionAlgorithmList;
+
+    /**
+     * AdditionalAlgorithms constructor.
+     *
+     * @param GetSourceSelectionAlgorithmListInterface $getSourceSelectionAlgorithmList
+     */
+    public function __construct(
+        GetSourceSelectionAlgorithmListInterface $getSourceSelectionAlgorithmList
+    ) {
+        $this->getSourceSelectionAlgorithmList = $getSourceSelectionAlgorithmList;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function toOptionArray()
+    {
+        $options = [
+            [
+                'value' => '',
+                'label' => '',
+            ],
+        ];
+        $algorithms = $this->getSourceSelectionAlgorithmList->execute();
+        foreach ($algorithms as $algorithm) {
+            if ($algorithm->getCode() === DefaultForCountryAlgorithm::CODE) {
+                continue;
+            }
+            $options[] = [
+                'value' => $algorithm->getCode(),
+                'label' => $algorithm->getTitle(),
+            ];
+        }
+        return $options;
+    }
+}
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/README.md b/InventoryDefaultForCountrySourceSelectionAdminUi/README.md
new file mode 100644
index 000000000000..6131f9db8129
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/README.md
@@ -0,0 +1,3 @@
+# InventoryDefaultForCountrySourceSelectionAdminUi module
+
+The `InventoryDefaultForCountrySourceSelectionAdminUi` module extends Magento's admin UI with source selection default for countries source selection functionality.
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/composer.json b/InventoryDefaultForCountrySourceSelectionAdminUi/composer.json
new file mode 100644
index 000000000000..2f83373d9840
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/composer.json
@@ -0,0 +1,24 @@
+{
+    "name": "magento/module-inventory-default-for-country-source-selection-admin-ui",
+    "description": "N/A",
+    "require": {
+        "php": "~7.3.0||~7.4.0",
+        "magento/framework": "*",
+        "magento/module-inventory-default-for-country-source-selection": "*",
+        "magento/module-inventory-source-selection-api": "*"
+    },
+    "type": "magento2-module",
+    "license": [
+        "OSL-3.0",
+        "AFL-3.0"
+    ],
+    "autoload": {
+        "files": [
+            "registration.php"
+        ],
+        "psr-4": {
+            "Magento\\InventoryDefaultForCountrySourceSelectionAdminUi\\": ""
+        }
+    },
+    "version": "1.2.0"
+}
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/etc/adminhtml/system.xml b/InventoryDefaultForCountrySourceSelectionAdminUi/etc/adminhtml/system.xml
new file mode 100644
index 000000000000..5145ecc93c2c
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/etc/adminhtml/system.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
+    <system>
+        <section id="cataloginventory">
+            <group id="source_selection_default_for_country" translate="label" type="text" sortOrder="600" showInDefault="1"
+                   showInWebsite="1" showInStore="0">
+                <label>Default For Country SSA</label>
+                <field id="additional_algorithm" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1"
+                       showInStore="0" canRestore="1">
+                    <label>Additional Algorithm</label>
+                    <source_model>Magento\InventoryDefaultForCountrySourceSelectionAdminUi\Model\Config\Source\AdditionalAlgorithms</source_model>
+                    <comment>Additional algorithm for cases when many countries available.</comment>
+                </field>
+                <field id="exclude_unmatched" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1"
+                       showInStore="0" canRestore="1">
+                    <label>Exclude Unmatched Sources From List</label>
+                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
+                    <comment>Sources which doesn't have assigned matched countries will be excluded from result list at all instead of pushing them to bottom of result list.</comment>
+                </field>
+            </group>
+        </section>
+    </system>
+</config>
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/etc/module.xml b/InventoryDefaultForCountrySourceSelectionAdminUi/etc/module.xml
new file mode 100644
index 000000000000..dc68398df964
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/etc/module.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
+    <module name="Magento_InventoryDefaultForCountrySourceSelectionAdminUi">
+        <sequence>
+            <module name="Magento_Framework" />
+            <module name="Magento_InventorySourceSelectionApi" />
+            <module name="Magento_InventoryDefaultForCountrySourceSelection" />
+        </sequence>
+    </module>
+</config>
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/i18n/en_US.csv b/InventoryDefaultForCountrySourceSelectionAdminUi/i18n/en_US.csv
new file mode 100644
index 000000000000..5b60c764f1f5
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/i18n/en_US.csv
@@ -0,0 +1,3 @@
+"Additional Algorithm","Additional Algorithm"
+"Additional algorithm for cases when many countries available.","Additional algorithm for cases when many countries available."
+"Default For Country SSA","Default For Country SSA"
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/registration.php b/InventoryDefaultForCountrySourceSelectionAdminUi/registration.php
new file mode 100644
index 000000000000..067380ced9a8
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/registration.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+\Magento\Framework\Component\ComponentRegistrar::register(
+    \Magento\Framework\Component\ComponentRegistrar::MODULE,
+    'Magento_InventoryDefaultForCountrySourceSelectionAdminUi',
+    __DIR__
+);
diff --git a/InventoryDefaultForCountrySourceSelectionAdminUi/view/adminhtml/ui_component/inventory_source_form.xml b/InventoryDefaultForCountrySourceSelectionAdminUi/view/adminhtml/ui_component/inventory_source_form.xml
new file mode 100644
index 000000000000..cdb1589a2aa0
--- /dev/null
+++ b/InventoryDefaultForCountrySourceSelectionAdminUi/view/adminhtml/ui_component/inventory_source_form.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
+    <fieldset name="countries_selection">
+        <settings>
+            <collapsible>true</collapsible>
+            <label translate="true">Default For Countries</label>
+            <dataScope>general</dataScope>
+            <imports>
+                <link name="visible">true</link>
+            </imports>
+        </settings>
+        <field name="default_for_countries" formElement="multiselect" sortOrder="10">
+            <settings>
+                <dataType>text</dataType>
+                <dataScope>extension_attributes.default_for_countries</dataScope>
+                <label translate="true">Country</label>
+                <notice translate="true">Used in "based by country" algorithm selection.</notice>
+                <validation>
+                    <rule name="required-entry" xsi:type="boolean">false</rule>
+                </validation>
+            </settings>
+            <formElements>
+                <multiselect>
+                    <settings>
+                        <options class="Magento\Directory\Model\Config\Source\Country"/>
+                    </settings>
+                </multiselect>
+            </formElements>
+        </field>
+    </fieldset>
+</form>
diff --git a/_metapackage/composer.json b/_metapackage/composer.json
index e4f37c07e2ef..0d7e9cf41d9f 100644
--- a/_metapackage/composer.json
+++ b/_metapackage/composer.json
@@ -75,6 +75,8 @@
         "magento/module-inventory-configurable-product-frontend-ui": "*",
         "magento/module-inventory-wishlist": "*",
         "magento/module-inventory-catalog-search-bundle-product": "*",
-        "magento/module-inventory-catalog-search-configurable-product": "*"
+        "magento/module-inventory-catalog-search-configurable-product": "*",
+        "magento/module-inventory-default-for-country-source-selection": "*",
+        "magento/module-inventory-default-for-country-source-selection-admin-ui": "*"
     }
 }