Kadri was assessed a five-minute major for charging and a game misconduct at 8:18 of the third period Thursday after leaving his feet and driving the head of Wingels, who was on his knees, into the boards.
The check came seconds after Wingels caught Leafs winger Mitch Marner with a high hit.
Kadri will miss Game 2 tomorrow night and Games 3 and 4 in Toronto next week.
Boston won the opening game 5-1.
This suspension is Kadri’s fourth in his career.