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No. you claim asylum at the border/airport when you enter with a visitor visa. Are you a registered refugee with UNHCR?

Just clarifying that at a land border you have to have a certain type of family member already in Canada with status in order to claim asylum.
 
I'm new Asylum seeker outside his home country.

Would suggest with trying to see if you secure a TRV. Have you looked to see if you qualify for any of the economic pathways to get PR? That would be the best way to come to Canada.