In 1947, she married Yugoslavian-born journalist Dragan Debeljevic. They had one daughter, who became very ill when she was young. Her daughter says that, later in life, when Lisa had her own health problems, she was able to give back to her mother some of the love and care that she herself had received as a child. Casa died on December 10, 2012 in Münsterlingen, Switzerland from natural causes, aged 93. A black flag was hung in her honor.