BACKGROUND: Chromosomal microdeletions in the 3q26-3q28 region are rare and often associated with fetal growth restriction (FGR), microcephaly, and dysmorphic features. However, the precise genetic mechanisms and phenotypic spectrum remain incompletely understood. This study reports a novel CASE DESCRIPTION: Here we report a 10-month-old girl with FGR and postnatal growth retardation. Molecular cytogenetic investigation [chromosomal single nucleotide polymorphism (SNP) microarray analysis] identified a CONCLUSIONS: This study identifies