According to the Pew Research Centre, Indonesia is home to 242 million Muslims and around 29 million Christians – 8.5 million of whom are Catholics.
Pope Francis is also expected to visit Papua New Guinea in August, the country’s foreign minister Justin Tkatchenko said in January.
A Vatican source said the Pope planned to visit Timor-Leste in the same month.
Since his election by cardinals in 2013, Pope Francis has made 44 trips abroad.
The Vatican has said he will visit Belgium later this year and the Pope has mentioned a possible visit to his native Argentina.
Questions about his health were revived after his last-minute cancellation at a major Good Friday procession.
In a brief statement Friday, the Vatican said that “to preserve his health ahead of tomorrow’s vigil and the Easter Sunday mass, Pope Francis will this evening follow the Way of the Cross at the Colosseum from the Santa Marta Residence”, where he lives.