The 18-year-old Ghanaian has been showing great promise in the Danish Superliga in his first months at the club.
Kamaldeen only arrived from the Right to Dream academy in February and has quickly settled into European football.
In 17 appearances for FCN, Kamaldeen has scored six goals and has an assist to his name.
His pace and skill have caught the eye, although he is still a raw talent and has room to improve.
Bayer are fully aware of Kamaldeen’s potential and have the the left-sided winger on their radar.
The clubs could not get the deal done in time for Rashica and Bayer made a quick attempt to sign Kamaldeen instead.
Nordsjaelland refused to sell their starlet on such short notice, even after Bayer made a €6m offer.
It is possible that Bayer could return for Kamaldeen in future as a cheaper alternative to Rashica.
Kamaldeen made his Ghana debut last Friday, playing 48 minutes in their 3-0 defeat to Mali.