Kawasaki disease (KD) is an acute necrotizing vasculitis that occurs in children <5 years of age. The cause of KD remains unknown, but various complications, including dilatation of the coronary arteries, can occur. Coronary artery aneurysm or ectasia are the most important complications of KD. Children with suspected KD who do not fulfill the diagnostic criteria may have incomplete KD. Given that incomplete KD is associated with delayed diagnosis and treatment, children with incomplete KD have a high risk of cardiovascular complications. Meanwhile, iron deficiency anemia (IDA) is one of the most prevalent micronutrient deficiencies in the world. Children with IDA are prone to infection and inflammation. We report the case of a 12-month-old girl with incomplete KD who presented with cardiac murmur and severe IDA.