According to GhanaSoccer.net, the 19-year-old has elected against honouring the Black Stars' call-up due to his ongoing commitment to the Germany youth ranks, having already represented the European nation at U19 and U20 levels.
Leweling, who was born in Nurnberg to a Ghanaian mother, primarily operates as a winger but is also capable of playing as a second striker, and has recorded three goals and two assists at club level since making his senior debut last year.
His apparent snub comes as a blow for Akonnor ahead of Thursday's clash against Sudan with Ghana already without the services of star midfielder Thomas Partey, who was ruled out of the encounter through injury.