diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index 6c71317f254..176d6543940 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -111,6 +111,7 @@ information provided here is intended especially for developers.
 * The minifier library used by core_minify has been switched to https://github.com/matthiasmullie/minify - there are minor differences
   in minifier output.
 * context_header additional buttons can now have a class attribute provided in the link attributes.
+* Webservice function mod_assign_get_submissions returns a new field 'gradingstatus' from each submission.
 
 === 3.1 ===
 
diff --git a/mod/assign/externallib.php b/mod/assign/externallib.php
index bb9598380a1..b815f75e639 100644
--- a/mod/assign/externallib.php
+++ b/mod/assign/externallib.php
@@ -763,7 +763,8 @@ class mod_assign_external extends external_api {
                         'status' => $submissionrecord->status,
                         'attemptnumber' => $submissionrecord->attemptnumber,
                         'groupid' => $submissionrecord->groupid,
-                        'plugins' => self::get_plugins_data($assign, $submissionplugins, $submissionrecord)
+                        'plugins' => self::get_plugins_data($assign, $submissionplugins, $submissionrecord),
+                        'gradingstatus' => $assign->get_grading_status($submissionrecord->userid)
                     );
                     $submissions[] = $submission;
                 }
@@ -840,7 +841,8 @@ class mod_assign_external extends external_api {
                 'groupid' => new external_value(PARAM_INT, 'group id'),
                 'assignment' => new external_value(PARAM_INT, 'assignment id', VALUE_OPTIONAL),
                 'latest' => new external_value(PARAM_INT, 'latest attempt', VALUE_OPTIONAL),
-                'plugins' => new external_multiple_structure(self::get_plugin_structure(), 'plugins', VALUE_OPTIONAL)
+                'plugins' => new external_multiple_structure(self::get_plugin_structure(), 'plugins', VALUE_OPTIONAL),
+                'gradingstatus' => new external_value(PARAM_ALPHANUMEXT, 'Grading status.', VALUE_OPTIONAL),
             ), 'submission info', $required
         );
     }
diff --git a/mod/assign/tests/externallib_test.php b/mod/assign/tests/externallib_test.php
index b97b84bb78b..3860001bb85 100644
--- a/mod/assign/tests/externallib_test.php
+++ b/mod/assign/tests/externallib_test.php
@@ -438,6 +438,7 @@ class mod_assign_external_testcase extends externallib_advanced_testcase {
         $submission = $assignment['submissions'][0];
         $this->assertEquals($sid, $submission['id']);
         $this->assertCount(1, $submission['plugins']);
+        $this->assertEquals('notgraded', $submission['gradingstatus']);
     }
 
     /**