Numerous studies emphasise the pivotal role of negative affect in the formation and maintenance of positive symptoms, which moves emotion regulation (ER) as a contributing factor into focus. We systematically reviewed and meta-analysed case-control studies reporting cross-sectional, correlative and experimental data of ER strategies in patients with psychotic disorders. In total, 42 studies were eligible, providing data for 2498 subjects and 3381 healthy controls. Questionnaire-based cross-sectional data (k=39) indicated strongest effects for rumination (g=-0,67 -0,85 to -0,48), self-blaming (g=-0,56; -0,76 to -0,37) and distraction (g=0,55 0,11 to 0,98). Suppression was more frequently (g=-0,36 -0,56 to -0,16) and cognitive reappraisal less frequently used (g=0,41 0,28 to 0,55), but heterogeneity was high. Correlative data (k=6) supported the assumption of an association between maladaptive strategies and positive symptoms (r=0,34 0,22 to 0,44). Less evidence of group differences was found in the experimental studies (k=3). The findings support the notion that ER is markedly impaired in patients with psychotic disorders. However, future research will need to further clarify the extent to which difficulties continue to exist after controlling for context and emotion intensity. The large effects for rumination and self-blaming point to promising treatment targets but also raise questions concerning the specifity of findings. •Emotion regulation (ER) is markedly impaired in patients with psychotic disorders.•Maladaptive ER is more frequently and adaptive ER less frequently used.•Maladaptive but not adaptive ER strategies are associated with severity of positive symptoms.•No differences are evident in experimental studies, in which patients were instructed to use ER strategies.