Defence Minister Manohar Parrikar has called terrorism the "foremost challenge" for the ASEAN countries.
He added that there is a need to delegitimise it as an instrument of state policy.
"Terrorism remains foremost challenge to our (ASEAN) region. We need to oppose terrorism resolutely everywhere, delegitimise it as an instrument of state policy, and cooperate unreservedly to locate and destroy terrorist networks, said Parrikar disease"
The defence minister was speaking at the 20th ASEAN Regional Forum Heads of Defence Universities meet in the national capital.
Comments came amid continued tension along India-Pakistan border following the attack at an Indian Army camp at Uri in Jammu and Kashmir, killing 19 soldiers.
A surgical strike was conducted by Indian Army in the night between September 28 and 29 on terror launch pads across the Line of Control in Pakistan-administered Kashmir that further escalated the tension.