Any autosomal agammaglobulinemia in which the cause of the disease is a mutation in the TCF3 gene. The disease is Monarch Disease Ontology entry MONDO_0014840 (agammaglobulinemia 8, autosomal dominant). Also known as: AGM8, TCF3 autosomal agammaglobulinemia, agammaglobulinemia 8, autosomal dominant; AGM8, autosomal agammaglobulinemia caused by mutation in TCF3.