Children with intellectual and developmental disabilities (IDDs) require intensive multicomponent interventions to learn to read. Parent-implemented interventions have been shown to be effective for children with disabilities and are one potential method for providing intervention. This study used a multiple probe single case design to evaluate the effectiveness of an early multicomponent reading intervention implemented by parents in the home. This study was designed as a conceptual replication of Lemons et al. in response to concerns with the overall quality of instruction during schooling at home during the COVID-19 pandemic. Three U.S. parents of children with IDD (ages 4-7 years) participated in this study. Results indicated that with systematic training, coaching, and feedback, parents were able to positively impact their child's reading abilities and implement the intervention with fidelity.