Atanga joined the Austrian Bundesliga club in January 2021 on a six-month loan where he managed 15 appearances and scored two goals with three assists.
The 24-year-old joined Kiel from Red Bull Salzburg on June 30, 2019, for €500,000.
Atanga made 19 appearances in the Bundesliga 2 and provided five assists in the first season for Kiel.
The former Ghana U17 and U20 player moved to Admira Wacker in search of playing minutes after failing to command a starting berth in the first half of the German second-tier.
Atanga will have to fight for starting places next season as Kiel's target promotion to the German top-flight. Read Full Story