Spinal Muscular Atrophy Type 3 (SMA Type 3) is a genetic disorder that affects the motor neurons in the spinal cord, leading to muscle weakness and atrophy. It is caused by a mutation in the SMN1 gene, which is essential for the survival of motor neurons. Symptoms typically appear in childhood or early adulthood, and individuals may experience difficulty walking, climbing stairs, or performing other physical activities. The severity of SMA Type 3 varies among individuals, with some maintaining the ability to walk into adulthood, while others may require mobility aids. Early diagnosis and intervention, including physical therapy and supportive care, can help improve quality of life for those affected by this condition.