The 23-year-old, who claimed bronze in slopestyle in Sochi, is expected to recover in time to compete at next year's Pyeongchang Winter Games, where he is expected be a gold medal contender in the new Olympic discipline of Big Air.
The accident marks a dark end to a brilliant season that saw McMorris win three X Games medals and two Crystal Globes, including the Big Air title and another as the overall Freestyle World Cup champion.
"Mark has shown incredible resilience and commitment to recovering from injury and we know that Pyeongchang 2018 will be a strong motivation for his comeback," said Canada Snowboard’s executive director, Patrick Jarvis in a statement.
(Reporting by Steve Keating in Toronto. Editing by Gareth Jones)
