Developmental disorders (DD) represent a spectrum of often severe disabilities that are present from birth or early childhood. The Deciphering Developmental Disorders in Africa study (DDD-Africa) was started to describe and define the causes of DD in Africa, and this resource holds the potential for much more discovery, using data science- and omics techniques. To advance our knowledge, we propose to use the clinical information, genetic data, and DNA resources from the DDD-Africa study to increase diagnostic yield and make new discoveries about the causes of DD in African patients. These findings will lead to population-relevant and scalable solutions for Africa, fast-tracking genomics efforts for global health.