Singh arrived in Cambodian capital Phnom Penh on Sunday for a three-day visit to attend the 10th ASEAN-India Summit and the seventh East Asia Summit (EAS).
India''s Dialogue Partnership with the ASEAN countries is one of the cornerstones of its Look East Policy.
India sees this partnership as a step to further economic growth and prosperity, peace and stability in the region.
After his meeting with ASEAN leaders, Singh also held bilateral talks with his Thailand counterpart, Yingluck Shinawatra.
ASEAN-India trade in 2011-12 reached USD 79.3 billion, crossing the target of USD 70 billion by 2012 set in 2009.
Both have a Free Trade Agreement (FTA) in goods, which was signed in 2009 and which became fully operational in August 2011.
Negotiations are underway on the FTA on services and investments.