Schauder was Jewish, and after the invasion of German troops in Lwów 1941 it was impossible for him to continue his work. Even before the Lwow ghetto was established he wrote to Ludwig Bieberbach pleading for his support. Instead, Bieberbach passed his letter to the Gestapo and Schauder was arrested. In his letters to Swiss mathematicians, he wrote that he had important new results, but no paper to write them down. He was executed by the Gestapo, probably in October 1943.