The chief negotiator, Mohammed Alloosh, says by not bringing a political deal or easing the plight of Syrians, the talks have failed.
He said in a statement that the peace talks had also failed to secure the release of thousands of detainees or to push Syria towards a political transition without President Bashar al Assad.
“The three rounds of talks were unsuccessful because of the stubbornness of the regime and its continued bombardments and aggressions towards the Syrian people,” Mohammed said.
“The endless negotiations are harming the fate of the Syrian people,” Alloush added, “I therefore announce my withdrawal from the delegation and my resignation” from the main opposition High Negotiations Committee (HNC).
Mohammed Alloush is the representative of the powerful Jaish al Islam rebel faction in the Saudi-based High Negotiations Committee (HNC).
More than 250,000 Syrians have been killed, and about 11 million people forced from their homes during the civil war.