नेपाली मा लेख्नुस न हजूर बुझन अलि सजिलो हुन्थ्यो.

Any green card holder visiting Nepal from US can stay in US for up to a year before the green card gets cancelled. To stay for more than a year for up to two years, you need to apply for reentry permit before leaving US. If you stay in nepal for more than 6 months, the time of residency requirement for US citizenship begins from the day you return back.

Dear ny2,
In this period, i f i stay outside of USA for more than six month but not for a year, does it affect my petition that i have filled as a lawful permanent residence. I filed I-130 for and its got approved from USCIS and now its in pending in NVC.

Are you saying you are a GC holder and petitioned i130 for someone (your immediate relative)? In that case your stay of more than 6 months will not hamper your application.