|This article does not cite any references or sources. (December 2009)|
In Canadian football, the three-minute warning is given when three minutes of game time remain on the game clock in the first and second halves of a game. (If the football is in play when the clock reaches 3:00, the three-minute warning is given immediately after the ball is declared dead.) The three-minute warning stops the game clock in all cases. Since the 2006 CFL season, CFL teams cannot use instant replay challenges to dispute the rulings of controversial plays during the final three minutes of the second half. However, a replay official may initiate a review during this time.