The COVID-19 lockdown increased the day-to-day challenges faced by parents, and thereby may have increased parental burnout risk. Therefore, identifying parental burnout protection factors is essential. This study aimed to assess the protective role of the following factors which can be increased through mindfulness practice: trait mindfulness, self-compassion, and concrete vs. abstract ruminations. A total of 459 parents (Mage = 40; 98.7% female) completed self-reported questionnaires at two-time points to assess the predictive role of mindfulness on parental burnout, self-compassion and rumination type, and the mediating role of self-compassion and rumination type in the relation between mindfulness and parental burnout. Results showed that trait mindfulness, self-compassion, and rumination type at Time 1 predicted levels of parental burnout at Time 2. Self-compassion (indirect effects: b = − 22, 95% CI = [−38, −05], p < 0.01), concrete ruminations (indirect effects: b = −20, 95% CI = [−32, −09], p < 0.001), and abstract ruminations (indirect effects: b = −0.54, 95% CI = [−71, −37], p < 0.001) partially mediated the relation between trait-mindfulness and parental burnout. These findings showed that trait mindfulness, self-compassion, and concrete (vs. abstract) ruminations may help prevent parental burnout in the context of the COVID-19 pandemic. These results contribute to the field of research on parental burnout prevention and will allow for the development of effective approaches to mental health promotion in parents.