If your visa to Canada was refused, perhaps you are wondering if you are blacklisted. Common reasons for denial are overstaying your visas, criminal convictions, misrepresentation, or violations of immigration laws. To check, review your immigration history, request case notes from IRCC, or consult a lawyer. Solutions include an application for a Temporary Resident Permit (TRP), Criminal Rehabilitation, or appealing the decision. Professional guidance is essential to resolve such issues and regain entry into Canada.
https://www.oasis-india.com/how-to-check-if-youre-blacklisted-by-canada-immigration/