Any autosomal recessive non-syndromic intellectual disability in which the cause of the disease is a mutation in the IMPA1 gene. The disease is Monarch Disease Ontology term MONDO_0015020 (intellectual disability, autosomal recessive 59). Also known as: IMPA1 autosomal recessive non-syndromic intellectual disability, MRT59, autosomal recessive non-syndromic intellectual disability caused by mutation in IMPA1, intellectual disability, autosomal recessive type 59, mental retardation, autosomal recessive 59, mental retardation, autosomal recessive type 59.