Susanne's personal life was marked by a series of tumultuous relationships and tragic events. Her first marriage to actor Hermann Nehlsen in 1956 was short-lived, as she attempted to take her own life twice in 1957 and was subsequently divorced. This tumultuous period was followed by her marriage to Helmuth Lohner in 1958, which lasted only five months before the couple divorced.
Susanne's second marriage to Helmuth Lohner was more successful, as it resulted in the birth of their daughter, Konstanze Lohner. However, this union was also short-lived, and the couple divorced once again. In 1966, Susanne married actor Kevin Hagen, but her happiness was short-lived, as she soon left for Munich, Germany to visit her friend Renate Ewert, only to discover her friend's lifeless body.
The exact circumstances surrounding Renate Ewert's death remain unclear, with reports suggesting that she had been dead anywhere from six days to three weeks. Susanne's life took a tragic turn in late 1968, when she entered a private clinic in Hollywood, California. She never recovered from her stay at the clinic and passed away on January 7, 1969, with some reports suggesting that medical malpractice may have contributed to her untimely demise.
