diff --git a/core/modules/file/src/Entity/File.php b/core/modules/file/src/Entity/File.php
index 0c34871f51d..6fd0cc758ae 100644
--- a/core/modules/file/src/Entity/File.php
+++ b/core/modules/file/src/Entity/File.php
@@ -186,7 +186,11 @@ class File extends ContentEntityBase implements FileInterface {
   public function preSave(EntityStorageInterface $storage) {
     parent::preSave($storage);
 
-    $this->setSize(filesize($this->getFileUri()));
+    // The file itself might not exist or be available right now.
+    $uri = $this->getFileUri();
+    if ($size = @filesize($uri)) {
+      $this->setSize($size);
+    }
   }
 
   /**
diff --git a/core/modules/file/src/Tests/FileManagedFileElementTest.php b/core/modules/file/src/Tests/FileManagedFileElementTest.php
index f5d5be39489..07102a04df9 100644
--- a/core/modules/file/src/Tests/FileManagedFileElementTest.php
+++ b/core/modules/file/src/Tests/FileManagedFileElementTest.php
@@ -171,4 +171,27 @@ class FileManagedFileElementTest extends FileFieldTestBase {
     $this->assertRaw('The file referenced by the Managed <em>file &amp; butter</em> field does not exist.');
   }
 
+  /**
+   * Ensure a file entity can be saved when the file does not exist on disk.
+   */
+  public function testFileRemovedFromDisk() {
+    $this->drupalGet('file/test/1/0/1');
+    $test_file = $this->getTestFile('text');
+    $file_field_name = 'files[nested_file][]';
+
+    $edit = [$file_field_name => drupal_realpath($test_file->getFileUri())];
+    $this->drupalPostForm(NULL, $edit, t('Upload'));
+    $this->drupalPostForm(NULL, array(), t('Save'));
+
+    $fid = $this->getLastFileId();
+    /** @var $file \Drupal\file\FileInterface */
+    $file = $this->container->get('entity_type.manager')->getStorage('file')->load($fid);
+    $file->setPermanent();
+    $file->save();
+    $this->assertTrue(file_unmanaged_delete($file->getFileUri()));
+    $file->save();
+    $this->assertTrue($file->isPermanent());
+    $file->delete();
+  }
+
 }