The presidents of the two countries held face-to-face talks on 10-11 February outside Paris on the status of the Armenian-majority enclave.
In the run-up to the summit, diplomats had expressed guarded optimism that progress could be made in settling the 18-year-old dispute, which has claimed at least 25,000 lives and driven more than a million people from their homes.
The Minsk group of Russian, French, and U.S. mediators are set to meet in Washington in March to formulate the framework of future negotiations.
(AFP)