BackgroundThe COVID‐19 pandemic results in disproportional consequences for psychiatric patients. Due to restraints in physical contacts, providers switched from face‐to‐face contacts to teletherapy, but prior experiences were mostly limited. The study aimed at assessing symptom dynamics, potentially increased adversities and factors influencing a successful transition into teletherapy in adolescent psychiatric outpatients during the COVID‐19 pandemic.MethodThirty adolescent psychiatric outpatients participated in an interview‐based study. The differential impact of the COVID‐19 pandemic was measured by integrating patients’ and psychiatrists’ judgements.ResultsPatients who reported deteriorated symptoms and patients who showed (partial) improvement of symptomatology could be separated by feelings of isolation (specific to deterioration) and perceived reduction in school‐associated stress (unique to improvement). Patients with worsening symptomatology showed a significantly higher degree of psychosocial disability before lockdown and at the first interview. Patients who deteriorated in their level of psychosocial functioning also reported negatively on teletherapy. These patients were verbally less differentiated concerning emotions and affect, reported introspection and rumination, and stated distinctly lower levels of perceived social support. Concerning adversities, no clear trend could be identified, but some patients reported increased domestic violence and neglect.ConclusionsPatients with a higher degree of psychosocial disability suffer disproportionally from the crisis, so that an assessment of functioning should serve as a triage tool. Also, a screening of the perceived level of social support should be established before offering teletherapy. Additionally, the provision of strategies to enhance verbalisation and differentiation of emotions and affect might be beneficial.