One in five people have lost a loved one in their circle of family, friends or acquaintances to suicide at least once in their lifetime. As relatives, those affected have a significantly higher risk of committing suicide themselves. This pilot study is the first German-speaking study, that has examined survivors of suicide loss. We consulted survivors of suicide, who were in contact with one of the support groups of AGUS e.V.in Germany. The study is divided into two parts. The first part is an online survey as a cross-sectional study. In the second part, we conducted semi-structured interviews. In the following longitudinal study, all participants were offered the possibility of a monthly telephone contact. After six months all study participants of the second part answered an online survey. Our study showed that relatives of a suicide victim (36%, N = 90) were more likely to suffer from mental illness than the German average (approx. 28%). A total of 48% (N = 114) of the participants described suffering or having suffered from grief for more than six months, which restricted them in social, professional, or other areas of daily life. Perceived psychological distress was found to decrease over time. One year after the loss, 64% (N = 23) of respondents reported high levels of psychological distress, whereas after more than five years, only 29% (N = 22) reported high levels of distress. In the second part of our study, 60% (N = 12) of participants reported suffering from passive fatigue, which was accompanied by occasional suicidal thoughts in 50% (N = 6 out of 12). With regard to the effectiveness of the telephone contacts, we did not find any significant differences between participants and non-participants. Overall, the telephone contacts were perceived as rather helpful and not very distressing (arithmetic mean 11%).