This systematic review aims to examine evidence on telemedicine-delivered interventions for autistic children and adolescents, considering diverse approaches, settings, and modalities used to address core symptoms and co-occurring conditions. A comprehensive search strategy consulted PubMed and PsycInfo databases from inception to March 2023. PROSPERO registration: CRD42023404111. Each work was screened, and two blind authors extracted data. Out of 6010 studies, 19 publications with 366 participants (305 carers and 61 autistic children/adolescents) were included. Combined findings from observational and experimental studies indicate telemedicine-delivered interventions are comparable in effectiveness to traditional "in-person" treatments and involve lower costs. Tele-intervention outcomes show promise in facilitating interventions, actively engaging parents, and generalizing the socio-communicative behaviors of children. While the enforced adoption of telemedicine during the COVID-19 pandemic has prompted clinicians to assess its role in the field of autism, a comprehensive understanding of its efficacy, benefits, and associated costs has yet to be fully established. Future studies should prioritize rigorous experimental methodologies, including subgroup analyses based on child/adolescent and family characteristics, aiding intervention implementation.