Talks between Abkhaz President Sergei Bagapsh, South Ossetian President Eduard Kokoity and Transdnestr President Igor Smirnov will be held at the two-day summit of the Association for Democracy and Human Rights in Sukhumi, the capital of Georgia's unrecognized republic of Abkhazia.
The organization was established by Abkhazia, South Ossetia and Transdnestr at a summit in Sukhumi in 2006.
Georgia has repeatedly expressed its intention to regain control over Abkhazia and South Ossetia. The two areas broke away from Georgia in the early 1990s, following the collapse of the Soviet Union, sparking a bloody conflict in the volatile region.
Transdnestr, which has an ethnic Russian majority, proclaimed its independence from Moldova in 1992.
Russia has peacekeepers in all three regions, but NATO, Georgia and Moldova have been urging a military pullout from former Soviet republics under the 1999 Istanbul Commitments, part of the amended Conventional Forces in Europe treaty.