This article presents an adaptation of group schema therapy (GST) developed for patients with severe anxiety. An anonymized case presentation exemplifies the adaptation. GST was originally developed to treat clients with maladaptive personality traits but has been applied to a variety of disorders in recent years. For patients with severe anxiety, who have not responded to other treatments, GST may be a promising approach. The paper presents the GST model, the evidence supporting it, and its adaptation for the treatment of anxiety. The case presentation illustrates the therapeutic process and GST interventions. Finally, the clinical outcome and the implications for implementing GST are discussed.