AimsThis study investigated fatigue in individuals with 22q11.2 deletion syndrome (22q11.2DS), identifying both physical and psychosocial factors.MethodsWe conducted a cross‐sectional web‐based survey of 125 parents of individuals with 22q11.2DS. Significant factors of fatigue were identified using bivariate analysis and forward stepwise binary logistic regression.ResultsOverall, 34% (42 of 125) of the participants reported fatigue. Bivariate analysis identified 37 variables linked with fatigue, of which 11 were significant in multivariable analysis: older age (odds ratio [OR] = 1.28, 95% confidence interval [CI] [1.07, 1.53], P = 0.008), history of auditory hypersensitivity (OR = 36.4, 95% CI [4.08, 323.8], P = 0.001), delayed motor development (OR = 10.4, 95% CI [1.78, 61.0], P = 0.009), difficulty participating in events (OR = 33.5, 95% CI [1.1, 1068.2], P = 0.047), inability to join groups (OR = 47.9, 95% CI [4.8, 481.7], P = 0.001), concerns about marriage (OR = 17.0, 95% CI [2.6, 112.7], P = 0.003), inability to attend facilities (OR = 20.4, 95% CI [1.4, 308.0], P = 0.029), poor coordination when changing medical facilities (OR = < 0.010, 95% CI [0, 0.014], P = 0.002), lack of understanding about the individual's condition (OR = 0.010, 95% CI [0, 0.502], P = 0.021), and requirement of visiting multiple departments within the hospital (OR = 46.6, 95% CI [1.9, 1124.6], P = 0.018).ConclusionsFatigue in 22q11.2DS is multifaceted, necessitating holistic fatigue management.