The 22-year-old centerman registered a career-high 10 goals and 22 points in 47 regular season games with Djurgarden of the Swedish Hockey League (SHL) during the 2017-18 campaign, before chipping in with one assist in seven games during the club's playoff run.
The Stockholm native debuted in the SHL ranks in 2014-15, and has since played 150 regular season games for Djurgarden, amassing 19 goals and 47 points along the way, in addition to posting a plus-16 differential.
The Canadiens selected Vejdemo in the third round, 87th overall, in the 2015 NHL Entry Draft.