The Canadiens welcome back a friendly face in Weise, as the 6-foot-2 power forward played 152 games from 2013-16 for Montreal. Weise enjoyed his best hockey with the Habs, registering a career-high 29 points during the 2014-15 campaign.
Folin has played in just 26 games this season, recording two assists for the Flyers. The Swedish blue-liner signed a 1-year, $800,000 deal with Philadelphia at the beginning of the season and will become a UFA on July 1.
A knee injury at the start of the campaign kept Schlemko sidelined until Nov. 10. He's appeared in 18 games for Montreal this season, splitting time with the Laval Rockets of the AHL. When healthy, Schlemko can provide some depth on defense for a Flyers team looking to make a late playoff push.
After a 48-game slate with the Canadiens last season, Froese spent all of 2018-19 with Laval. With 110 games of NHL experience under his belt, the 27-year-old could be an option should the Flyers run into injury trouble down the stretch.