In August Zimmermann was selected to represent Germany at the 2018 European Championships alongside Petz, Emma Malewski, Lara Hinsberger, and Leonie Papke. Together they finished seventh in the team final. Individually Zimmermann was the second reserve for the vault final. Later in the year Zimmermann was selected to represent Germany at the 2018 Youth Olympic Games. While there she qualified to the all-around final and the vault final and was the first reserve for the uneven bars, balance beam, and floor exercise finals. She ended up placing twelfth in the all-around final and fifth in the vault final.