Objectives Parental psychosis poses a risk factor for a child's well-being. Few studies have focused on the parents' views of how their psychosis affects their parenting, and results for parenting ability in this group are contradictory. The present study aimed to explore how parents with psychosis experience the effect(s) of their illness on parenting. Methods In-depth and semi-structured interviews were conducted with 15 parents who attended outpatient clinics specializing in psychosis. The transcripts were analyzed using thematic analysis. Data related to the research aim were analyzed deductively according to the protection, reciprocity, control, guided learning, and group participation model of parenting. Data in each domain were subsequently coded inductively to form subthemes. Results Results show that all domains of parenting appear to be affected by psychosis. The parents specifically mentioned that depression, fatigue, and difficulty focusing because of hearing voices had negative impacts on their abilities to provide protection, reciprocity, and control. The parents also expressed difficulties in maintaining routines in the child's everyday life. Furthermore, the theme "Unpredictable absences" crosses all domains and highlights the parents' recurrent mental and physical absences from their children during psychotic episodes. Conclusions The present study provides some insight into how different aspects of parenting may be affected by psychosis. We suggest that these effects on parenting need to be further explored and confirmed by research focusing on the child's perspective and on observations of parent-child interaction. Keywords Parental psychosis • Parenting • Psychiatric services • Schizophrenia • Qualitative study Nearly 6% of children in Sweden grow up with a parent with mental illness (Hjern and Manhica 2013), but international figures point to as many as one in five children (Reupert et al. 2012). International as well as studies from Scandinavia estimate that a substantial minority of patients in adult psychiatric care have children under 18 years old (Lauritzen 2014; Maybery and Reupert 2018; Ruud et al. 2019). The increased risk of developing mental health problems is well established in children growing up with a parent with mental illness (LeFrancois 2012; Leijdesdorff et al. 2017; Ramchandani and Psychogiou 2009).