The 27-year-old Onana joined United from Inter Milan in July, taking over as first choice at Old Trafford from David De Gea, who left after 12 years at the club.

Onana announced his international retirement after his suspension was imposed for "disciplinary reasons", thought to stem from a falling-out with Cameroon coach Rigobert Song.

In what would be a U-turn, the former Ajax player could line up against Burundi in a winner-takes-all Group C qualifier on September 12, ahead of next year's African finals, to be hosted by Ivory Coast in January and February.

Speaking in a news conference after revealing Onana's recall, Song said: "There were never any problems. I said at the last [news] conference that it was all up to him and he knew what he had to do.

"If he is on the list, it is because he did the right thing. He is one of the best goalkeepers. The door was always open, it is better to have all these players there than not to have them.

"There were never any problems with Andre and, as I said, he was the only one who knew what he had to do and we are satisfied that he joins the group and we really count on everyone."

There was no immediate direct response from Onana.

Instead, on his Instagram stories channel, the goalkeeper posted a message on Tuesday with the African proverb: "The lie bears flowers but not fruit."

BBC Sport has attempted to contact Onana's representatives for clarification regarding his availability to Cameroon.

Namibia top Group C by one point but have completed their matches after the pool was reduced to three teams following Kenya's expulsion, with two to advance.

Cameroon hold second spot on goal difference from Burundi who they host in the decider.

The tournament itself was moved to early 2024 from this summer due to weather concerns with Confederation of African Football (Caf) president Patrice Motsepe admitting the timing is "not the ideal time because of the European clubs, but it is the only choice we have".

Players in Europe face having to miss a large chunk of the domestic season to represent their countries.

Former Liverpool and West Ham defender Song took over as Cameroon coach in March 2022 but saw his side eliminated at the group stage of the World Cup having only taken a point from their first two games before beating already qualified Brazil in their final match.

The 2024 Afcon finals will begin on 13 January, the day United host Tottenham in the Premier League, with the final on 11 February.