While parenting has been widely studied, most research, locally and internationally, focuses on children’s academic or behavioural outcomes rather than on self-regulation, a key skill for managing emotions, behaviours, and cognition. This gap is significant as self-regulation strongly influences children’s adjustment and well-being. Moreover, parenting behaviours vary across cultures; Asian expressions of warmth and control may differ from Western norms, and sensitive parenting does not always predict positive outcomes in Singapore. Given Singapore’s unique mix of Asian heritage and Western influences, locally grounded research is needed. This study examines (1) how Singaporean parents display control, warmth, and discipline across ethnic and socioeconomic groups, and (2) how these behaviours and parent–child attachment predict children’s self-regulation and subsequent emotional and behavioural outcomes. Using a three-wave longitudinal mixed-methods design, the study recruits 200 mother–child pairs.