+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
Left 2021 April

No one here can tell you if you will be allowed back into Canada or not. That will be up to CBSA when you arrive. You can try and see what happens.
 
3 year overstay

As already stated impossible to stay but there is a very good chance you may have difficulty entering. Did you also work illegally while in Canada or can you prove that you were living off savings? That also could lead to problems. Did you use your business visa for it’s intended purpose? You will need to have very good proof that you intend to return home this time if you are able to enter. If able to enter you may be limited to a short visit. What are your reasons for entering Canada and how long do you want to remain in Canada.