Can I adjust status after overstaying tourist visa if I marry a US citizen?

As an overstay, you are deportable. If you have overstayed by more than six months, your departure will trigger a 3-year bar to returning. If you have overstayed by more than one year, your departure will trigger a 10-year bar to returning. If you are married to a U.S. citizen and are otherwise admissible, you can file to adjust your status. Your overstay will be held against you in the discretionary determination, but it is not a legal preclusion to your obtaining status. Hire an attorney to ensure your adjustment filing with CIS is properly handled and you are prepared for the required interview.