This mixed-methods single arm pilot study examined the feasibility, acceptability, and preliminary outcomes of a co-designed mindful parenting intervention for parents of children with ADHD, Parents that Mind (PTM). The 5-week parent-only intervention comprised two face-to-face group retreats and 5 weeks home practice. Eighteen parents of children with ADHD participated in PTM, completing self-report questionnaires and semi-structured interviews. Indicating high acceptability, 100% of parents interviewed reported PTM was helpful and they would recommend PTM. High feasibility of parents attending one face-to-face retreat was observed, with all parents attending the first retreat, however intervention adherence was challenging, with 55% of parents attending the second retreat. Barriers to intervention adherence included: lack of time, work commitments, illness and exhaustion. Quantitative data indicate promising preliminary effects for parents and children. Addressing the barriers raised by parents in this pilot appear necessary, before examining efficacy in a blinded RCT.