One of the major immigration problems in Canada is inadmissibility. Inadmissibility to Canada is an immigration issue that essentially means that a person is barred from entering the country. There are a few different causes for inadmissibility, most having to do with medical issues or criminal history. If a person has been convicted of, or committed a crime in their home country, and that crime has an equivalent under Canadian law, the person may be considered inadmissible to Canada due to criminality. It is important to note that not all crimes and convictions make a person inadmissible to Canada. The crime has to be of a certain degree of seriousness. One common reason for criminal inadmissibility is a DUI charge. People with one or more recent convictions for driving while intoxicated are likely to be turned away from entering Canada. Other crimes that can cause criminal inadmissibility include theft, reckless driving and assault. A DUI conviction can cause problems entering Canada for up to 10 years from the completion of the sentence. After 10 years, you are considered rehabilitated.