You can petition for your parents if you are a US citizen and at least 21 years of age. However, it appears as if your parents may be subject to the 10-year bar from returning to the US because they may have been unlawfully present in the US in excess of 1 year. In order to return to the US before the 10-years, they must apply for a waiver on form I-601 and get it approved by USCIS. To be eligible for the waiver, they must be able to prove extreme hardship to a parent(s) or spouse who is a legal permanent resident or citizen of the US.
Answered on Dec 26th, 2013 at 9:40 PM