Which courses are available in Canada or USA after completing 3 years Diploma in electrical?

If you have completed Diploma after your SSC, you can apply for a Bachelor Degree. Alternatively you can apply for an Advanced Diploma too. Have you taken IELTS?

There are advance diplomas available but in your case, I would suggest you to write directly to the universities and check how you can be accommodated. Let me know if you need the colleges list.