Suzuki tied it 1-1 at 14:37 with his 26th goal of the season, tying his NHL career high. He scored to the stick side when he one-timed a quick pass from Slafkovsky after Cole Caufield’s forecheck caused Bruins defenseman Brandon Carlo to turn over the puck.
Pastrnak hit the left post with a backhand at 14:50 of the second period after deking Montembeault on a breakaway.
Boston’s power play went 0-for-4 and is 0-for-7 over the past two games.
The Canadiens killed 3:01 of a double minor after Suzuki was called for high-sticking at 12:06 of the third period while they were on a power play.
“I think it was a huge part of the game,” Montreal defenseman David Savard said. “You know late in the game getting a four-minute call is always tough, but we got it for our captain and we gave ourselves a chance to get the extra point. But I wish we were on the other side tonight.”
The Canadiens, who did not allow a power-play goal for a sixth straight game, have killed 19 straight opportunities and 26 of 27.
“The guys are blocking shots, they’re dialed in,” Montembeault said. “They go out there and they’re confident that they’re going to get the kill.”
Bruins defenseman Andrew Peeke played 17:01 and blocked two shots in his first game since being traded from the Columbus Blue Jackets on Friday.
“I thought his gaps were good,” Montgomery said. “I thought he was aggressive. I thought he was physical, separating people. I thought he did a good job on the 4-on-4 when we put him out there. He played aggressive, which is what we’re looking for, using his feet.”
NOTES: With his assist, Marchand passed Patrice Bergeron for the most overtime points in Bruins history (26; 19 goals, seven assists). … Boston defenseman Matt Grzelcyk did not make the trip, and forward James van Riemsdyk did not play, each because of illness. … Suzuki also scored 26 goals last season.