 Chettri played for India U16 during the qualification for the 2008 AFC U-16 Championship.He made his debut at the under-16 level during qualifying on 27 October 2007 against Sri Lanka U17 coming on as a 78th-minute substitute for Tanmoy Ghosh as India U16s won the match 6–0.He scored his first goal at U-16 level on 7 November 2007 against Bhutan in 34th minute as India U-16 went on to win that match and qualify for the final rounds of the 2008 AFC U-16 Championship.