Synonyms: Del(3)p(25.3) | Intellectual disability-epilepsy-stereotypic hand movement syndrome | Monosomy 3p25.3
3p25.3 microdeletion syndrome is a rare chromosomal anomaly characterized by intellectual disability epilepsy or EEG abnormalities poor speech ataxia and stereotypic hand movements.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version May 2026
Newly diagnosed with
3p25.3 microdeletion syndrome?
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Advocacy Organizations
Rare Chromosome Disorder Support Group – Unique
Through sharing knowledge and lived experience, Unique helps families and professionals navigate the world of chromosome and gene disorders
ReNU2 United
ReNU2 United fosters collaboration, supports families, raises awareness, and advances research into RNU2-2-related neurodevelopmental disease.
Uganda Alliance of Patients Organization
Supporting patients to access quality, safe and patient-centered healthcare services.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.