"This cease-fire must be unconditional and strictly respected by both parties," French president Emmanuel Macron said.
"France will remain committed [to the issue] so that hostilities cease for a lasting period and that credible discussions can quickly begin."
The truce is set to enter into force on September 18 midnight.
Azerbaijan, with help from Turkey and Syrian and Libyan mercenaries deployed by Ankara, started a war against Karabakh (Artsakh) in the morning of September 27. The Armenian side has reported deaths and injuries both among the civilian population and the military. Foreign and local journalists too have been injured in Azeri shelling of towns and villages.