diff -Nuar a/vendor/magento/module-sitemap/Model/Observer.php b/vendor/magento/module-sitemap/Model/Observer.php
--- a/vendor/magento/module-sitemap/Model/Observer.php
+++ b/vendor/magento/module-sitemap/Model/Observer.php
@@ -7,8 +7,10 @@ namespace Magento\Sitemap\Model;

 use Magento\Sitemap\Model\EmailNotification as SitemapEmail;
 use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\ObjectManager;
 use Magento\Sitemap\Model\ResourceModel\Sitemap\CollectionFactory;
 use Magento\Store\Model\ScopeInterface;
+use Psr\Log\LoggerInterface;

 /**
  * Sitemap module observer
@@ -61,20 +63,33 @@ class Observer
      */
     private $emailNotification;

+    /**
+     * @var int
+     */
+    private $retryInterval = 10;
+
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
     /**
      * Observer constructor.
      * @param ScopeConfigInterface $scopeConfig
      * @param CollectionFactory $collectionFactory
      * @param EmailNotification $emailNotification
+     * @param LoggerInterface|null $logger
      */
     public function __construct(
         ScopeConfigInterface $scopeConfig,
         CollectionFactory $collectionFactory,
-        SitemapEmail $emailNotification
+        SitemapEmail $emailNotification,
+        LoggerInterface $logger = null
     ) {
         $this->scopeConfig = $scopeConfig;
         $this->collectionFactory = $collectionFactory;
         $this->emailNotification = $emailNotification;
+        $this->logger = $logger ?: ObjectManager::getInstance()->get(LoggerInterface::class);
     }

     /**
@@ -87,6 +102,7 @@ class Observer
     public function scheduledGenerateSitemaps()
     {
         $errors = [];
+        $sitemapsWithError = [];
         $recipient = $this->scopeConfig->getValue(
             Observer::XML_PATH_ERROR_RECIPIENT,
             ScopeInterface::SCOPE_STORE
@@ -107,11 +123,33 @@ class Observer
             try {
                 $sitemap->generateXml();
             } catch (\Exception $e) {
+                $sitemapsWithError[] = $sitemap;
                 $errors[] = $e->getMessage();
             }
         }
+
         if ($errors && $recipient) {
-            $this->emailNotification->sendErrors($errors);
+            sleep($this->retryInterval);
+            $message = 'Sitemap generation errors occurred: ';
+            $message .= join(';', $errors);
+            $this->logger->debug($message);
+            $this->logger->debug('Sitemap generation retry attempt');
+            $nonRecoverableErrors = [];
+            //re-try to write sitemap again
+            foreach ($sitemapsWithError as $sitemap) {
+                try {
+                    $sitemap->generateXml();
+                } catch (\Exception $e) {
+                    $nonRecoverableErrors[] = $e->getMessage();
+                }
+            }
+            if (!empty($nonRecoverableErrors)) {
+                $this->emailNotification->sendErrors($nonRecoverableErrors);
+                $message = 'Sitemap generation non-recoverable errors occurred: ';
+                $message .= join(';', $nonRecoverableErrors);
+                $this->logger->debug($message);
+            }
         }
+
     }
 }