I have a gmat score of 610 and a GPA 3.3 with 3 years work ex.
Which schools in the US can I hope to get an admit?

Try this: Shortcut to find the best US MBA www.find-mba.com/board/36065

What are your career goals?

Assuming you'd be considered an international student, your GMAT is rather low.

However, you'd be in the ballpark for schools like UT Knoxville, maybe, or Georgia State/Robinson. Depends on a lot of things, your goals, your background and extracurriculars, etc.