[8] He made his debut for Hannover 96 at age 17, on 14 December 2013, in the match against Nürnberg, replacing Artur Sobiech in the 74th minute.

[14] On 1 February 2025, Sulejmani returned to Hannover 96, joining the reserve team's squad after having trained with them in late 2024.

[18] Two days later, on 3 August 2014, the media reported that his club Hannover 96 had not given him permission to play for the Albania U-21, but Sulejmani himself declared that he would be part of the team in future matches.

[19] On 1 October 2014, Sulejmani received another call-up from Albania under-21 for the friendly match against Romania U21,[20] but declined the invitation.

On 7 October 2015, Sulejmani received a call-up from Kosovo for a friendly match against Equatorial Guinea[21] coming on as a substitute in the 57th minute for Mërgim Brahimi.