The Nigerian leader addressed the Portuguese parliament on Thursday.
The education, natural resources, and energy ministers were dismissed 24 hours after their appointment was announced.
Mr Akufo-Addo applauded President Umaro Sissoco Embalo of Guinea Bissau for foiling an attempted coup against his government on Tuesday.
Mr Embalo assured Mr Buhari the situation had been brought under control and that “all is well, and normalcy fully restored.”
“When added to successful coups in Mali, Burkina Faso, Guinea, and Chad…there is no doubt that West African leaders are nervously looking over their shoulders.”