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Can please someone tell if Mewar University MCA is equivalent to Canada's Masters? Will WES consider MCA from Mewar University or not?

Yes or No!
 
Most probably, While submit the application in WES, If your university is listed in registered university and also your course then its mostly providing equivalent.

You should contact Mewar University - Registrar or transcript department. They might having other students also so they will suggest what you should do - WES or other one (ICAS).