This article is a list of prisoners of Nazi concentration camps designated return unwanted (German: Rückkehr unerwünscht), which was used to forbid their...

Rückkehr unerwünscht (abbreviated RU, "return unwanted") – a designation given to certain concentration camp prisoners who were forbidden to be released and...

two-thirds of Slovakia's Jews were deported to the Auschwitz concentration camp and camps and ghettos in the Lublin Reservation. Initially unaware of the Nazi...