Am I too late to get research experience before applying for a master program (Canada)
I don't know any specific expectations in Canada but I doubt the expectations about research experience are very high when applying for a Master. Also you seem to assume that informal experience doesn't count, but it probably does: for instance you could do a small project, e.g. reproducing state of the arts results for a problem of interest and analyzing the results. It might not count as much as a formal research internship but it certainly qualifies as research experience. If a professor accepts to guide you in such a project and gives you a good LOR at the end, then it's virtually equivalent to a research internship. At least that's how I would interpret it, but you should discuss this with somebody involved in this particular Master programme.