My B.Tech aggregate is 68% with a backlog history of 3. Can I get admission in any of the Canadian universities for Masters?

It is not a bad GPA but I suggest you to clear backlogs. In Canada, the entry requirements for Masters is set by the universities based on their reputation in the world. So, you'll have chances to get admission in any Canadian university. First, list out all the universities you'd like to get in and

Hello Ramini, Universities abroad look for a wider spectrum of knowledge from prospective students. It's not about the top score in academics. Hence I would advise you to approach an agency that deals in sending students to Canada for MS. Best wishes.