The meeting comes after months of increasing tensions over the timetable for restoring civilian rule in Mali after two coups, and a military takeover in 2020.
In August 2020, army officers led by Colonel Assimi Goita overthrew elected president Ibrahim Boubacar Keita.
Colonel Goita subsequently promised to restore civilian rule in February 2022 after holding presidential and legislative elections.
But an interim civilian government was forced out in May 2021, disrupting the reform timetable, and was met with widespread diplomatic condemnation.
At a summit on December 12, ECOWAS leaders reiterated demands that the elections be held by February 27 as initially planned.
They maintained sanctions such as asset freezes and travel bans within the ECOWAS region against around 150 junta figures and their families and threatened further economic and financial measures.
The possibility of fresh sanctions was expected to be on the agenda at Sunday’s summit.