Overview
3q29 microdeletion syndrome is a rare genetic condition caused by a tiny missing piece of chromosome 3, in a region called 3q29. This deletion removes a small segment of genetic material that contains several important genes. The syndrome is also sometimes called 3q29 deletion syndrome. Because multiple genes are affected, the condition can impact many different parts of the body and brain. People with 3q29 microdeletion syndrome often have mild to moderate intellectual disability and developmental delays, meaning they may take longer to reach milestones like talking or walking. Many individuals also have a higher risk of psychiatric conditions, especially schizophrenia and autism spectrum disorder. Physical features can include a small head size, a slender build, and subtle differences in facial appearance. Some people have heart defects present at birth, feeding difficulties in infancy, or problems with coordination. There is currently no cure for 3q29 microdeletion syndrome. Treatment focuses on managing each person's specific symptoms. This can include early intervention therapies such as speech therapy, occupational therapy, and physical therapy. Mental health support and educational accommodations are also very important. With the right support, many individuals can make meaningful progress and lead fulfilling lives.
Key symptoms:
Mild to moderate intellectual disabilityDelayed speech and language developmentDelayed walking or motor milestonesAutism spectrum disorder featuresHigh risk of schizophrenia or psychosisAnxiety and mood difficultiesSmall head size (microcephaly)Slender body buildSubtle differences in facial featuresHeart defects present at birthFeeding difficulties in infancyPoor coordination or balance problemsAttention difficulties or ADHDGastrointestinal problems such as gastroesophageal reflux
Clinical phenotype terms (44)— hover any for plain English
Variable
Can be inherited in different ways depending on the underlying gene
Infantile
Begins in infancy, roughly 1 month to 2 years old
FDA & Trial Timeline
1 eventRutgers, The State University of New Jersey
Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.
Treatments
No FDA-approved treatments are currently listed for 3q29 microdeletion syndrome.
1 clinical trialare actively recruiting — trials can provide access to cutting-edge therapies.
View clinical trials →Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to 3q29 microdeletion syndrome.
Community
No community posts yet. Be the first to share your experience with 3q29 microdeletion syndrome.
Start the conversation →Latest news about 3q29 microdeletion syndrome
Disease timeline:
New recruiting trial: The 3q29 Deletion and 3q29 Duplication: Architecture of Behavioral Phenotypes
A new clinical trial is recruiting patients for 3q29 microdeletion syndrome
Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What therapies should my child start right away, and how do we access them?,How often should we monitor for psychiatric symptoms, and what early warning signs should we watch for?,Does my child need a heart evaluation, and how often should it be repeated?,Should other family members be tested for this deletion?,What educational supports and services is my child entitled to?,Are there any clinical trials or research studies we could participate in?,What should we plan for as my child transitions into adulthood in terms of housing, employment, and medical care?
Common questions about 3q29 microdeletion syndrome
What is 3q29 microdeletion syndrome?
3q29 microdeletion syndrome is a rare genetic condition caused by a tiny missing piece of chromosome 3, in a region called 3q29. This deletion removes a small segment of genetic material that contains several important genes. The syndrome is also sometimes called 3q29 deletion syndrome. Because multiple genes are affected, the condition can impact many different parts of the body and brain. People with 3q29 microdeletion syndrome often have mild to moderate intellectual disability and developmental delays, meaning they may take longer to reach milestones like talking or walking. Many individu
At what age does 3q29 microdeletion syndrome typically begin?
Typical onset of 3q29 microdeletion syndrome is infantile. Age of onset can vary across affected individuals.
Are there clinical trials for 3q29 microdeletion syndrome?
Yes — 1 recruiting clinical trial is currently listed for 3q29 microdeletion syndrome on UniteRare. See the clinical trials section on this page for phase, sponsor, and site details sourced from ClinicalTrials.gov.
Which specialists treat 3q29 microdeletion syndrome?
10 specialists and care centers treating 3q29 microdeletion syndrome are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.