diff --git a/mod/lesson/lib.php b/mod/lesson/lib.php
index 5898fc3b86f..b3ce5985a3a 100644
--- a/mod/lesson/lib.php
+++ b/mod/lesson/lib.php
@@ -1675,6 +1675,13 @@ function mod_lesson_core_calendar_provide_event_action(calendar_event $event,
     // Apply overrides.
     $lesson->update_effective_access($userid);
 
+    // Mimics get_participant checks from mod_assign.
+    if (!$lesson->is_participant($userid)) {
+        // If the user is not a participant then they have
+        // no action to take. This will filter out the events for teachers.
+        return null;
+    }
+
     return $factory->create_instance(
         get_string('startlesson', 'lesson'),
         new \moodle_url('/mod/lesson/view.php', ['id' => $cm->id]),
diff --git a/mod/lesson/locallib.php b/mod/lesson/locallib.php
index c65a6cafb14..5b847da7294 100644
--- a/mod/lesson/locallib.php
+++ b/mod/lesson/locallib.php
@@ -1728,6 +1728,25 @@ class lesson extends lesson_base {
         }
     }
 
+    /**
+     * Checks user enrollment in the current course.
+     *
+     * @param int $userid
+     * @return null|stdClass user record
+     */
+    public function is_participant($userid) {
+        return is_enrolled($this->get_context(), $userid, 'mod/lesson:view', $this->show_only_active_users());
+    }
+
+    /**
+     * Check is only active users in course should be shown.
+     *
+     * @return bool true if only active users should be shown.
+     */
+    public function show_only_active_users() {
+        return !has_capability('moodle/course:viewsuspendedusers', $this->get_context());
+    }
+
     /**
      * Updates the lesson properties with override information for a user.
      *
diff --git a/mod/lesson/tests/lib_test.php b/mod/lesson/tests/lib_test.php
index 74641d093bf..ed6a7db532a 100644
--- a/mod/lesson/tests/lib_test.php
+++ b/mod/lesson/tests/lib_test.php
@@ -226,11 +226,16 @@ class mod_lesson_lib_testcase extends advanced_testcase {
         $this->setAdminUser();
         // Create a course.
         $course = $this->getDataGenerator()->create_course();
+        // Create a teacher and enrol into the course.
+        $teacher = $this->getDataGenerator()->create_and_enrol($course, 'teacher');
         // Create a lesson activity.
         $lesson = $this->getDataGenerator()->create_module('lesson', array('course' => $course->id,
             'available' => time() - DAYSECS, 'deadline' => time() + DAYSECS));
         // Create a calendar event.
         $event = $this->create_action_event($course->id, $lesson->id, LESSON_EVENT_TYPE_OPEN);
+
+        // Log in as the teacher.
+        $this->setUser($teacher);
         // Create an action factory.
         $factory = new \core_calendar\action_factory();
         // Decorate action event.
@@ -346,6 +351,8 @@ class mod_lesson_lib_testcase extends advanced_testcase {
 
         // Create a course.
         $course = $this->getDataGenerator()->create_course();
+        // Create a teacher and enrol.
+        $teacher = $this->getDataGenerator()->create_and_enrol($course, 'teacher');
 
         // Create a lesson activity.
         $lesson = $this->getDataGenerator()->create_module('lesson', array('course' => $course->id,
@@ -354,6 +361,8 @@ class mod_lesson_lib_testcase extends advanced_testcase {
         // Create a calendar event.
         $event = $this->create_action_event($course->id, $lesson->id, LESSON_EVENT_TYPE_OPEN);
 
+        // Now, log in as teacher.
+        $this->setUser($teacher);
         // Create an action factory.
         $factory = new \core_calendar\action_factory();
 
@@ -411,7 +420,8 @@ class mod_lesson_lib_testcase extends advanced_testcase {
 
         // Create a course.
         $course = $this->getDataGenerator()->create_course();
-
+        // Create a teacher and enrol into the course.
+        $teacher = $this->getDataGenerator()->create_and_enrol($course, 'teacher');
         // Create a lesson activity.
         $lesson = $this->getDataGenerator()->create_module('lesson', array('course' => $course->id,
             'available' => time() + DAYSECS));
@@ -419,6 +429,8 @@ class mod_lesson_lib_testcase extends advanced_testcase {
         // Create a calendar event.
         $event = $this->create_action_event($course->id, $lesson->id, LESSON_EVENT_TYPE_OPEN);
 
+        // Now, log in as teacher.
+        $this->setUser($teacher);
         // Create an action factory.
         $factory = new \core_calendar\action_factory();
 
@@ -476,13 +488,15 @@ class mod_lesson_lib_testcase extends advanced_testcase {
 
         // Create a course.
         $course = $this->getDataGenerator()->create_course();
-
+        // Create a teacher and enrol into the course.
+        $teacher = $this->getDataGenerator()->create_and_enrol($course, 'teacher');
         // Create a lesson activity.
         $lesson = $this->getDataGenerator()->create_module('lesson', array('course' => $course->id));
 
         // Create a calendar event.
         $event = $this->create_action_event($course->id, $lesson->id, LESSON_EVENT_TYPE_OPEN);
-
+        // Now, log in as teacher.
+        $this->setUser($teacher);
         // Create an action factory.
         $factory = new \core_calendar\action_factory();
 
diff --git a/mod/lesson/tests/locallib_test.php b/mod/lesson/tests/locallib_test.php
index e12e6e80e61..0ea349b11fa 100644
--- a/mod/lesson/tests/locallib_test.php
+++ b/mod/lesson/tests/locallib_test.php
@@ -216,4 +216,39 @@ class mod_lesson_locallib_testcase extends advanced_testcase {
 
         $this->assertEquals($comparearray, lesson_get_user_deadline($course->id));
     }
+
+    public function test_is_participant() {
+        global $USER, $DB;
+        $this->resetAfterTest();
+        $this->setAdminUser();
+        $course = $this->getDataGenerator()->create_course();
+        $student = $this->getDataGenerator()->create_and_enrol($course, 'student');
+        $student2 = $this->getDataGenerator()->create_and_enrol($course, 'student', [], 'manual', 0, 0, ENROL_USER_SUSPENDED);
+        $lessonmodule = $this->getDataGenerator()->create_module('lesson', array('course' => $course->id));
+
+        // Login as student.
+        $this->setUser($student);
+        // Convert to a lesson object.
+        $lesson = new lesson($lessonmodule);
+        $this->assertEquals(true, $lesson->is_participant($student->id),
+            'Student is enrolled, active and can participate');
+
+        // Login as student2.
+        $this->setUser($student2);
+        $this->assertEquals(false, $lesson->is_participant($student2->id),
+            'Student is enrolled, suspended and can NOT participate');
+
+        // Login as an admin.
+        $this->setAdminUser();
+        $this->assertEquals(false, $lesson->is_participant($USER->id),
+            'Admin is not enrolled and can NOT participate');
+
+        $this->getDataGenerator()->enrol_user(2, $course->id);
+        $this->assertEquals(true, $lesson->is_participant($USER->id),
+            'Admin is enrolled and can participate');
+
+        $this->getDataGenerator()->enrol_user(2, $course->id, [], 'manual', 0, 0, ENROL_USER_SUSPENDED);
+        $this->assertEquals(true, $lesson->is_participant($USER->id),
+            'Admin is enrolled, suspended and can participate');
+    }
 }