Nutrition plays a key role in brain development in the first 1000–2000 days of life(1). Furthermore, fussy eating is broadly defined as the inconsistent rejection and acceptance of both familiar and unfamiliar foods(2). Fussy eating is reportedly found in 10–15% of 2–3-year-old children, although typically starts to decrease in prevalence by 4 years old(3). Despite this decrease in the general population, children with neurodevelopmental disabilities, such as autism spectrum disorder, can see a protracted continuation of fussy eating and reject approximately 30% more foods than typically developing children(4). Consequently, for some children with neurodevelopmental disabilities maintaining adequate nutritional intake can be a challenge. Key nutrients for optimal neurodevelopment include iron, omega-3, protein, zinc and folate(1), and underconsumption of these nutrients can lead to poorer developmental outcomes in some children(1). Limited empirical evidence has been published on fussy eating in children with neurodevelopmental disabilities and no studies has examined the effects of poor diet variety on their emotional regulation. This study aims to systematically review current evidence to determine the association between fussy eating, diet variety and experiences of emotional regulation in children with neurodevelopmental disability. The search strategy was designed with the use of database specific index phrasing and was modified and tested several times before the formal search day. The systematic literature review was conducted across Medline, Scopus, Embase, Cinahl and Google Scholar. Studies included were dated from 2014–2024 and must have included children with a diagnosed or suspected neurodevelopmental condition and be aged been 1 to 9 years. Articles were excluded if children were following diets restricted by caregivers such as vegetarianism or ketogenic diets. Studies which focused primarily on a psychological outcome were also excluded due to the scope of the research not being within a nutrition related field. All articles were stored in Endnote, with duplicates removed before screening. The search results yielded 500 articles, following screening 10 full text articles met all inclusion criteria. Following data extraction, results illustrated that children with neurodevelopmental disabilities and observed fussy eating behaviours can experience difficulties regulating emotions. Additionally, diet variety was found to be consisting primarily of processed grains and meats, with minimal wholegrain and vegetable intake. Further research is needed to understand the aetiology and causative pathways between fussy eating, diet variety and emotional regulation for children with neurodevelopmental disability to better inform potential dietary interventions in this population.