diff --git a/admin/tool/uploaduser/index.php b/admin/tool/uploaduser/index.php
index 4cb60666a57..9787ebb93af 100644
--- a/admin/tool/uploaduser/index.php
+++ b/admin/tool/uploaduser/index.php
@@ -971,6 +971,7 @@ echo $OUTPUT->heading(get_string('uploaduserspreview', 'tool_uploaduser'));
 $data = array();
 $cir->init();
 $linenum = 1; //column header is first line
+$noerror = true; // Keep status of any error.
 while ($linenum <= $previewrows and $fields = $cir->next()) {
     $linenum++;
     $rowcols = array();
@@ -1007,7 +1008,8 @@ while ($linenum <= $previewrows and $fields = $cir->next()) {
             $rowcols['status'][] = get_string('fieldrequired', 'error', 'city');
         }
     }
-
+    // Check if rowcols have custom profile field with correct data and update error state.
+    $noerror = uu_check_custom_profile_data($rowcols) && $noerror;
     $rowcols['status'] = implode('<br />', $rowcols['status']);
     $data[] = $rowcols;
 }
@@ -1032,9 +1034,10 @@ $table->head[] = get_string('status');
 
 echo html_writer::tag('div', html_writer::table($table), array('class'=>'flexible-wrap'));
 
-/// Print the form
-
-$mform2->display();
+// Print the form if valid values are available
+if ($noerror) {
+    $mform2->display();
+}
 echo $OUTPUT->footer();
 die;
 
diff --git a/admin/tool/uploaduser/locallib.php b/admin/tool/uploaduser/locallib.php
index fea9569ff76..2350b14aca9 100644
--- a/admin/tool/uploaduser/locallib.php
+++ b/admin/tool/uploaduser/locallib.php
@@ -390,3 +390,35 @@ function uu_pre_process_custom_profile_data($data) {
     }
     return $data;
 }
+
+/**
+ * Checks if data provided for custom fields is correct
+ * Currently checking for custom profile field or type menu
+ *
+ * @param array $data user profile data
+ * @return bool true if no error else false
+ */
+function uu_check_custom_profile_data(&$data) {
+    global $CFG, $DB;
+    $noerror = true;
+
+    // find custom profile fields and check if data needs to converted.
+    foreach ($data as $key => $value) {
+        if (preg_match('/^profile_field_/', $key)) {
+            $shortname = str_replace('profile_field_', '', $key);
+            if ($fields = $DB->get_records('user_info_field', array('shortname' => $shortname))) {
+                foreach ($fields as $field) {
+                    require_once($CFG->dirroot.'/user/profile/field/'.$field->datatype.'/field.class.php');
+                    $newfield = 'profile_field_'.$field->datatype;
+                    $formfield = new $newfield($field->id, 0);
+                    if (method_exists($formfield, 'convert_external_data') &&
+                            is_null($formfield->convert_external_data($value))) {
+                        $data['status'][] = get_string('invaliduserfield', 'error', $shortname);
+                        $noerror = false;
+                    }
+                }
+            }
+        }
+    }
+    return $noerror;
+}
\ No newline at end of file
diff --git a/user/profile/field/menu/field.class.php b/user/profile/field/menu/field.class.php
index 5548fb31814..d1aa2ae6785 100644
--- a/user/profile/field/menu/field.class.php
+++ b/user/profile/field/menu/field.class.php
@@ -94,10 +94,10 @@ class profile_field_menu extends profile_field_base {
     function convert_external_data($value) {
         $retval = array_search($value, $this->options);
 
-        // If value is not found in options then return -1, so that it can be handled
+        // If value is not found in options then return null, so that it can be handled
         // later by edit_save_data_preprocess
         if ($retval === false) {
-            $retval = -1;
+            $retval = null;
         }
         return $retval;
     }