Retailers in Wales saw the worst June sales figures in more than 20 years, according to the British Retail Consortium.
UK-wide, it was the worst June on record for retail performance.
Footfall declined by more than 6%, the steepest month-on-month decline since September 2018. This represents a ten times greater decline in footfall than in cities across the UK.
The British Retail Consortium said Wales is being particularly badly hit by political and economic uncertainty in the UK.
Shopping centres in Wales saw a nearly 6% fall in footfall, which represents the second highest area of the UK.
The BRC's statistics cover the period from 26 May to 29 June 2019.