Parents are a vulnerable group to increased distress resulting from the COVID-19 pandemic. In this study, 80 parents with at least mildly elevated internalizing symptoms were randomized to receive a four session, transdiagnostic intervention via telehealth during the height of the COVID-19 pandemic based on the Unified Protocols for Transdiagnostic Treatment of Emotional Disorders (UP-Caregiver), immediately or 6-weeks after receipt of psychoeducational materials. Results showed no between-condition differences in slopes of primary outcome measures; however, significant group differences in intercepts indicated that those receiving UP-Caregiver immediately had greater improvements in distress tolerance and intolerance of uncertainty than those in the delayed condition. Analyses also suggested within-condition improvements in emotional functioning and high satisfaction with UP-Caregiver. Results suggest that psychoeducation and symptom monitoring may be helpful to some distressed parents. Future investigations should utilize a larger sample to identify which parents might benefit the most from interventions like UP-Caregiver during crises.