In March Seitz competed at the DTB Pokal Team Challenge where she helped Germany place second behind Russia. In April Seitz competed at the 2017 European Championships in Cluj-Napoca. She qualified to the uneven bars in joint first with Nina Derwael of Belgium. During the final, however, she missed a connection and finished in third place, tied with Ellie Downie of Great Britain and finishing behind Derwael and Elena Eremina of Russia.