Nen Sothearoth made his international debut in an unofficial friendly match against the Philippines in 2012. He played in his first official matches for Cambodia three years later during 2018 [FIFA World Cup qualification (AFC)|qualification for the 2018 World Cup].
Club career
Nen Sothearoth started playing for Svay Rieng in 2011, although he was part of a debated incident in a controversial match against Phnom Penh Crown as in minute 41 he appeared to clear the ball off the line with his hand. Referee Thong Chankethya missed the incident and only gave a corner, the first of four such incidents in the match.