Background: Burnout among nurses may be influenced by organizational forgiveness, a common trait of forgiveness among nurses in the workplace that describes an organization's capacity to forgive perceived wrongdoing or infractions. A leadership style known as "organizational forgiveness" focuses on tactics that make it easier for people to forgive when misconduct occurs in the workplace. Aims: explore the relation between burnout levels and ruminative thought styles, as well as organizational forgiveness, in psychiatric nurses. Method: A descriptive correlational research design was conducted on a purposive sample of 128 psychiatric nurses at El-Azazi Mental Health, Hospital in Abo Hamad City, Elsharkia Governorate, Egypt. Demographic characteristics, Maslach burnout inventory, ruminative thought styles questionnaire, organizational forgiveness scale were the tools of the study. Results: 54.7% of the studied nurses exhibited extreme total burnout, with a mean (SD) of 58.6 (11.4). Specifically, 52.3%, 53.9%, and 57.1% of them experienced high burnout in the domains of emotional exhaustion, depersonalization, and reduced sense of personal achievement, respectively. Furthermore, 46.9% of the nurses demonstrated high levels of ruminative thought, with a mean score of 74.6 (16.5), while 48.4% showed moderate levels of organizational forgiveness, with a mean score of 49.3 (8.9). Conclusions: The significant positive correlation was observed between burnout levels and ruminative thoughts underscores the impact of psychological distress on cognitive processes among nurses. Conversely, the significant negative correlation between burnout, ruminative thought, and nurses' organizational forgiveness suggests that as burnout and rumination increase, forgiveness toward the organization decreases.