Canada determines if a foreign national with a criminal conviction is eligible to enter the country by determining what the Canadian equivalent to their crime is. In Canada drunk driving is an extremely serious offense, and consequently a misdemeanor DUI as well as a felony DUI are both equal to a felony DUI in Canada, making the individual ineligible to visit Canada without special permission. If you are an American and have been charged with a first offencDUI in the past 10 years, the ONLY way to enter Canada is via a TRP or rehabilitation.