I have done B.com(3 years) from India and want to do mba in canada.I have got 79% in B.Com and 7.5 bands in IELTS and I have yet to appear for GMAT.I am having 1 year of work experience during my vacations in parts.I want to know about the universities who admit students with 3 year graduation.

So do you have a Bachelor's degree? I don't think the time spent obtaining the degree is as important as the degree earned. However, you will definitely need more work experience if you plan to apply to a top MBA program in the US. Ideally, your work experience should be challenging and demonstrate professional growth as your career progresses.