Objective To study the level of carer reported distress in mild dementia, over a 3‐year period. Methods This study is part of the Norwegian DemVest‐study and utilises data from carers of people with mild dementia (n = 223). Those diagnosed with dementia with Lewy bodies (DLB, n = 63) and Alzheimer's disease (AD, n = 97) were included together with other dementia types (n = 63). The Relatives' Stress Scale was used to assess the level of reported distress in carers.