[slodave]

Here's a little info on the subject.
Canada: DWI or DUI - Driving convictions - TripAdvisor

Canada’s Immigration and Refugee Protection Act, Chap. 27 (2001), § 36, states that a “foreign national” is “inadmissible” if that person “committed” or was “convicted of” a single offense that would constitute an “indictable” offense under an Act of Parliament. It does not matter if the offense occurred in another country. Driving under the influence, driving with a .08 percent or higher alcohol content, refusing a chemical test, leaving the scene of an accident, and driving on a suspended license, are each independently deemed to be indictable offenses under the Criminal Code of Canada. A conviction for anyone of these offenses makes one inadmissible to Canada. Moreover, a “conviction” includes deferred dispositions where a “guilty” or “no contest” plea has been entered.

Maybe it's not considered a felony - thought I had read that, but the Canadians treat the offense worse than we do..