Sri Lanka has been attempting to reconcile its population since a bloody 26-year civil war ended in 2009.
Before becoming prime minister in January 2015, Wickremesinghe had accused the Australian government of turning a blind eye to human rights abuses in Sri Lanka in return for Sri Lankan government support in preventing asylum seekers from reaching Australia.
Wickremesinghe stood by that criticism on Wednesday, but said the bilateral relationship under the current Sri Lankan government had not suffered because of it.