Banks are international these days. So are collection agencies. Assume they can prosecute in Canada.
Your best bet, I think, is to talk to the bank ASAP, before they write you off as a bad debt. You aren't the only person to lose a job. If you haven't been running the card up to its maximum to keep yourself afloat -- if you're really just left with a normal balance -- you may be able to talk them into letting you make some token payment for a few months while you get at least enough of a temp job to feed yourself and start making larger payments to them. Convince them that you will pay it off, so it's better for them to carry you than to sell your account at a partial loss.
Also, it's time to swallow your pride and ask relatives if they could help you cover that minimum payment. Offer to pay them interest on the loan they make to you -- they may turn you down, but making it a business transaction saves face for everyone and makes destroying the relationship less likely.
(I've been on the other side of a "help, I'm out of work and need to cover expenses" loan -- and it really was a loan, legal paperwork and me paying tax on the interest income and all, though I insisted on charging a minimal interest rate.)