I am also in Canada. Last summer I parked my car (BMW 325xi) at the Markville mall in Markham, Ontario. When I came out after 1/2 hour the passenger mirror was missing (the glass part), there was no sign of force. I went to the BMW dealership and they replaced it under warranty. I assumed that it had fallen off because of poor workmanship.
Looking back, maybe the mirror was kicked out. ???