He handed over his withdrawal letter to President Pranab Mukherjee this afternoon.
"I have withdrawn the support as the Centre has shown no keenness in condemning the genocide of Tamils in Sri Lanka," Thol said after the meeting Mukherjee.
Traditionally an ally of DMK, he is the only member of VCK in Parliament.
"We want that the Centre should pass a resolution in Parliament at least condemning the genocide," Thol, an MP from Chidambaram constituency, said.