I have 6 cgpa and GMAT score of 670. Which University should I focus on. I have work experience of more than 3 years

You can give more details like you goals when you finish MBA? What are the split scores?
Where you are planning to do your MBA?

I wish to do my MBA in non US University primarily Canada. MBA in Marketing specialisation and join branding and innovation is the goal

Rotman has some interesting marketing-related curriculum - including an MBA major in brand management, but I'd worry that your work experience would be too low to be competitive there. It would be a reach school for sure.

Your work experience is also on the low side for other top schools in Canada like Schulich, UBC, etc.

Something like Ryerson might be more within your reach.