Diotte sponsored private member's bill C-306, "An Act to establish a Crimean Tatar Deportation ("Sürgünlik") Memorial Day and to recognize the mass deportation of the Crimean Tatars in 1944 as an act of genocide." This bill sought to recognize the mass deportations of Crimean Tatars in 1944 by the Soviet regime as genocide and establish May 18 as a day of commemoration. Bill C-306 was defeated at second reading.