The session was postponed due to the death of Mariam Mustafa Berri, sister of Speaker Nabih Berri, Voice of Lebanon radio (93.3) reported.
The cause of her death was not revealed by VOL.
The funeral will be held Saturday at her hometown Tebnin and Berri would be receiving condolences in Beirut on December 14 and 15 , NNA added.
The most recent national dialogue session was held on November 25. The participants addressed the ongoing presidential vacuum .
Lebanon has been without a president since May 2014 when the term of Michel Suleiman ended without the election of a successor.