Weise, a former Canadien, has played 42 matches in 201819 together with five goals and six assists. The 30-year-old had 59 points in 152 matches with Montreal from 2013-2016.
A 27-year-old Swede, folin, was doing 26 games with Philadelphia this season, recording two assists.
Schlemko, acquired in a transaction with Vegas had two assists in 18 games with the Canadiens this season.
Froese signed as a free agent with Montreal. He had been leading the American Hockey League’s Laval Rocket together with 14 targets.