He and Mnangagwa are co-chairing the summit as current chairpersons of the East African Community (EAC) and the Southern African Development Community (SADC), respectively.
The EAC-SADC initiative is an Africa-led process aimed at restoring peace and stability in the DRC and complements ongoing mediation efforts by the United States and Qatar.
On June 27, Rwanda and the DRC signed a peace agreement in Washington, DC, to ease tensions and end cross-border hostilities.
The DRC has accused Rwanda of supporting rebel groups and facilitating mineral smuggling from its territory.