Featuring controversial speaker Faith Goldy, the event was organised by a visiting Ryerson University tutor.
But on Wednesday, the school cancelled the 22 August event because it said it could not guarantee public safety.
The clashes in the US claimed one woman's life when a car ploughed into a crowd of anti-fascists.
A spokesperson said the university was "prioritising safety" over free speech "in light of recent events".
"There is often a tension at universities resulting from our commitment to be a place for free speech and our commitment to be a place that is civil, safe, and welcoming. In light of recent events, Ryerson University is prioritising campus safety," said university spokesperson Michael Forbes in an email.