Mr Leo visited Algeria, Cameroon, Angola, and Equatorial Guinea to strengthen interfaith dialogue.
In tribute, Pope Leo said, “Let us thank the Lord for the great gift of Francis’ life to the whole Church and to the whole world.”
On Monday, the U.S. President faced widespread criticism from Americans following an image depicting him as Jesus Christ.
The Pope, in a Palm Sunday address, had rebuked Mr Trump for threatening to destroy Iranian civilisation.
The president has come under heavy criticism over the post.
Pope Leo called on world leaders to abandon war and embrace dialogue.
Pope Leo XIV is set on Thursday to preside over the first of the religious rites leading up to Easter Sunday in Rome and the Vatican.
”May the Lord grant that the blood he shed may be a seed of peace for beloved Lebanon,” the pontiff said.
