Power would be transferred in a ceremony on Tuesday, and Joseph said he expected to be the foreign minister in the new government.
The Caribbean nation has been engulfed in what is widely viewed as a power struggle between three contenders for the Haitian presidency: Joseph, who has served as the interim prime minister; internationally-backed Ariel Henry, who was appointed prime minister just two days before Moise was killed but had not yet been sworn in; and the candidate put forth by the Haitian Senate, Joseph Lambert.
The Core Group, an influential international body made up of ambassadors from Germany, Brazil, Canada, Spain, the United States, France, the European Union, the Organization of American States, and the United Nations, released a statement on Saturday "strongly encouraging" the acting prime minister to designate Henry as the country's next president to ensure the "formation of a consensual and inclusive government."