Warnaweera was a member of the current interim committee governing the SLC until was suspended last month for failing to cooperate with the ICC anti-corruption probe.
Warnaweera, a former Test medium pacer in the early 90s, headed the southern sea side stadium of Galle as its curator.
He was accused of sharing pitch information in an ICC anti-corruption probe.
SLC said that Warnaweera has been suspended for two years from taking part in cricket, management and representation.