ObjectiveFor parents and guardians, assisting children/adolescents with severe obesity to lose weight is often a key objective but a complex and difficult challenge. Our aim in this study was to explore parents’ (and guardians’) perspectives on the challenges they have faced in assisting their children/adolescents with severe obesity to lead a healthy lifestyle.MethodsThirteen parents/guardians were interviewed from a pool of families who had been referred butdid notengage between 2016 and 2018 (N= 103), with the Perth Children’s Hospital Healthy Weight Service, a clinical obesity program for children/adolescents (parent age M = 43.2 years, children ageM= 10.3 years). Using semi-structured interviews and thematic analysis, we identified 3 broad themes.ResultsParental weight-related factors reflected parents’ own lifelong obesity narrative and its effect on their own and their families’ ability to live a healthy lifestyle. Perceived inevitability of obesity in their child reflected parents’ feelings that the obesity weight status of their children/adolescent was a persistent and overwhelming problem that felt ‘out of control’. Lastly, parents reported challenges getting medical help stemming from co-morbid medical diagnosis in their child/adolescent, and difficulties with medical professionals.ConclusionThis study demonstrates that parents face challenges in supporting healthy lifestyle for children/adolescents with severe obesity due to parents own internal weight biases and their negative experiences within the healthcare system when seeking help.