A disagreement with coach Rigobert Song over tactics at the Qatar World Cup saw the goalkeeper suspended for “disciplinary reasons”.
Cameroon attempted to bring Onana back into the fold ahead of this month’s Africa Cup of Nations qualifier against Burundi, where defeat to the minnows will see the five-time champions fail to qualify for next year’s tournament.
Manchester United keeper Onana released a lengthy statement on Monday explaining why he has accepted the call-up.
He wrote: “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.
“My desire to represent my country has never wavered since my youth, and this aspiration remains an inseparable part of my identity. Nothing and no one can shake this conviction. I answer my nation’s call with unshakeable certainty, aware that my return is not only to honour my dream, but also to respond to the expectations and support of Cameroonians, who deserve a national team determined to shine.
“In the face of manipulation, lies and abuse of power, I choose to remain true to my ideals, proudly representing a country that deserves our sincere commitment. Now is the time to unite, to work in harmony for our common good: Cameroon.
“I would like to salute the government, which is working hard to build a better Cameroon for all. My thoughts are with the people of Cameroon, to whom I offer my infinite thanks for their support, and whom I look forward to seeing again.
“Time, the infallible judge of all things, will eventually enlighten us and reveal the rightness of our actions. My commitment to Cameroon remains unwavering, and I am determined to play my part in seeing it prosper.”