Chromosome 4q deletion is a chromosome abnormality that affects many different parts of the body. People with this condition are missing genetic material located on the long arm (q) of chromosome 4 in each cell. The severity of the condition and the associated signs and symptoms vary based on the size and location of the deletion and which genes are involved. Common features shared by many people with this deletion include distinctive craniofacial features, skeletal abnormalities, heart defects, intellectual disability, developmental delay, and short stature. Most cases are not inherited, although affected people can pass the deletion on to their children.