New Zealand wrestler Michelle Montague has been ruled out of the Commonwealth Games after breaking her leg while training in Canada.

The 24-year-old, who also broke the same left leg in 2016 and missed the New Zealand national championships, suffered the injury last week but still travelled to the Gold Coast this week to support her team.

She had been due to compete in the 68kg class.

"I caught a weird angle at a weird time I guess and threw it," she said on Instagram.

"Obviously no Commonwealth Games this year for me. I'll get home, get fixed and head over and support my team-mates."

She was philosophical about the "heartbreaker" injury and said the training in Canada would still be of benefit as she worked towards the 2022 Games in Birmingham.

"It is a contact sport. That sort of stuff just does happen.

"Just because you break a leg it doesn't mean you forget everything you've learnt."

The injury reduces the New Zealand wrestling team to six. The wrestling competition starts next week.