Entartete Kunst
She committed suicide in 1933, partly as a result of having been subjected to such hostility and continuing harassment by antisemitic forces, partly due to disappointments on the personal level. In a note to her sister, she decried the insanity of the world. In 1937, the Nazis designated Rée's work as "Degenerate art" and began purging it from museum collections. Wilhelm Werner, a groundskeeper at the Kunsthalle Hamburg preserved many of Rée's paintings by hiding them in his apartment.