Law for the Prevention of Genetically Diseased Offspring (German: Gesetz zur Verhütung erbkranken Nachwuchses) or "Sterilisation Law" was a statute in Nazi Germany enacted on July 14, 1933, (and made active in January 1934) which allowed the compulsory sterilisation of any citizen who in the opinion of a "Genetic Health Court" (Erbgesundheitsgericht) suffered from a list of alleged genetic disorders – many of which were not, in fact, genetic. The elaborate interpretive commentary on the law was written by three dominant figures in the racial hygiene movement: Ernst Rüdin, Arthur Gütt and the lawyer Falk Ruttke.

While it has close resemblances with the American Model Eugenical Sterilization Law developed by Harry H. Laughlin, the law itself was initially drafted in 1932, at the end of the Weimar Republic period, by a committee led by the Prussian health board.