The Ghanaian international, who has already played with the Rossoneri from 2010 to 2013, had been dismissed from the German club last May after a 0-2 defeat against Cologne for his poor performance, although his contract runs until June 20, 2016.
Kevin-Prince Boateng was kicked out of the squad 10 days ago following their shock 2-0 league defeat at Cologne.
Citing religious violence at home, close to 200 Ghanaians have applied to stay permanently in Brazil.
Portugal did not fare much better than Ghana, because it, too, was knocked out. Even with the United States losing to Germany, 1-0, in Recife, the U.S. advanced, on goal differential.
Just a day after seeming to resolve a possible player mutiny over World Cup bonus payments, the Ghana Football Association released two separate statements saying two of the country's stars, Sulley Muntari and Kevin-Prince Boateng
Both Arsenal and Barcelona have won two games out of two and victory on Matchday 3 will take them closer to qualification for the knockout phases.
Boateng suffered a knee injury after scoring in Schalke's match against Augsburg on October 5.
European champions Bayern will provide an acid test of Schalke's winning streak, but there promises to be fireworks when the Boateng brothers clash. "He is my brother, but there will be no love lost in the game," said Berlin-born Kevin-Prince Boateng.
Dortmund dislodged Bayern, who beat Hanover 96 2-0, from the top of the table after a 6-2 victory over Hamburg.
The 26-year-old German-born Ghanaian international started his career in the Bundesliga with Hertha Berlin, his hometown team, in 2005.