Zach Fucale was recalled from the American Hockey League’s Laval Rocket on an emergency basis Friday after the Canadiens announced that Montoya had an upper-body injury.
Montreal is already without star goalie Carey Price, who is day-to-day with a lower-body injury.
Montoya, 32, is 2-1-0 with a 3.77 goals-against average and .863 save percentage so far this season.
Charlie Lindgren has filled the void in net for the Habs with both Montoya and Price hurt.
The 23-year-old entered Saturday’s game against the Buffalo Sabres with a 2-1-0 record, 1.35 GAA and .961 save percentage while also earning one shutout.