Emergency talks were triggered after Burkina Faso became the third member of the ECOWAS to be overtaken by the military in less than two years.
The announcement from the bloc known as ECOWAS came days after the country's military deposed President Roch Kabore.
The leaders previously issued a statement to say the bloc "firmly condemns" the coup, accusing the military of forcing Kabore to resign "under threat, intimidation and pressure".
New military leader Paul-Henri Damiba promises normalcy and security to farmers and herders in Africa's Sahel nation, saying he will retake control of those areas dominated by insurgents.
African and Western powers denounce what they called an "attempted coup" and the EU demands "immediate" release of President Roch Marc Christian Kabore.
Soldiers in poor landlocked African country stage mutinies at several barracks to demand sacking of military top brass and allocation of more resources to seven-year battle against insurgents.
The protesters call for President Roch Marc Christian Kabore to resign for his government's inability to stop attacks linked to Al Qaeda and Daesh spreading across the country.
Interim Prime Minister Choguel Kokalla Maiga has said that the imposed sanctions weakened the state, adding that a response strategy has been formulated against them.
The former president was found dead in his home, after reports of being in declining health since his forced resignation in August 2020.
The denouncement comes after a regional grouping decided to freeze Mali's assets, a pressure tactic against the ruling junta amid concerns over the future of democracy in the West African country.
ECOWAS leaders have decided to close borders with Mali and impose economic sanctions in response to an "unacceptable" delay by the country in holding promised elections.
Mali's transitional government initially agreed to hold elections in February 2022, but the military junta now says return to civilian rule may take up to five years due to security issues.
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