Bereaved parents may experience diverse psychological symptoms. Possible interventions are not yet well established. In this study, the psychological symptoms of 323 bereaved parents (mean age = 39.97, SD = 7.21, 52.0% female), referred to a 4-week family-oriented rehabilitation (FOR) program, were assessed. The baseline assessments indicated that 160 (49.5%) parents showed symptoms of prolonged grief disorder (PGD). Complicated grief was indicated in 272 (84.2%), depression in 191 (59.1%), and posttraumatic stress disorder in 242 (74.9%) parents. Mothers were at higher risk of complicated grief ( p ≤ .001), depression ( p = .029), and posttraumatic stress disorder ( p = .004), compared to fathers. Significant remissions of symptoms between admission and discharge from the program are presented as symptoms of complicated grief, depression, and posttraumatic stress. The effect sizes ranged between d = 0.68 and 1.22. In addition, significantly fewer parents fulfilled PGD criteria on discharge from the FOR program ( p ≤ .001). The special FOR program appears promising with regard to improving the bereaved parents’ mental health.