Patel was hosting the dinner for the visiting Canadian Prime Minister Justin Trudeau and his delegation.
"The High Commission has rescinded Mr. Atwals invitation.? We do not comment of matters relating to the PM's security?," the Canadian High Commission here said.
Atwal was convicted for trying to kill the then Punjab minister Malkiat Singh Sidhu in Vancouver in 1986.
The cancellation comes at a time when Trudeau's pro-Khalistan approach is being criticised by many including Punjab Chief Minister Amarinder Singh, who raised the issue with the Canadian prime minister during a meeting.
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