Sweden scored in the 55th minute after a counter attack which saw striker Blackstenius prod the ball past onrushing keeper Stephanie Labbe for her first goal of the tournament.
Canada had a chance to get back into the game after 68 minutes when they got a penalty for handball after a lengthy VAR review but veteran keeper Hedvig Lindahl made a fantastic save from Janine Beckie to push the ball out for a corner.
In sweltering conditions at the Parc des Princes, the two teams struggled to create chances in the first half but Sweden came out flying after the break missing several opportunities.
