The 27-year-old last played for his country during the 2022 World Cup in Qatar, where he left the tournament early and later announced his retirement from international football.
Onana is now excited to feature in next Tuesday's Africa Cup of Nations qualifying match against Burundi.
In a statement released via social media, Andre writes: “In the world of football, as in life, decisive moments arise that require crucial choices to be made.
“In recent months, I have been confronted with trials marked by injustice and manipulation. Yet my unshakeable love and attachment to my homeland, Cameroon, remain intact.