Quebec's traffic court system is entirely different than Ontario's. For example, in Quebec the officer does not have to show up to testify. They can take the officer's notes, prosecute and convict you on that alone... and the success rate is very, very high. There are additional administrative fees for fighting tickets in Quebec, and surcharges for getting convicted in court. The system is set up to stop people from fighting their tickets.
It's one thing to fight tickets in places like Ontario, Alberta, BC, etc. For Quebec, I'd suggest you at least talk to someone with experience fighting tickets in Quebec, even with the three year delay.
* The above is NOT legal advice. By acting on anything I have said, you assume responsibility for any outcome and consequences. *
http://www.OntarioTicket.com OR http://www.OHTA.ca