Most shops in Malmö city are open seven days a week. Malmö Citysamverkan (the local town centre magagement) has set recommended opening hours. See a list of the recommended times and holiday times for 2018 here. However local businesses decide their own opening hours and therefore theese may vary. Over 400 shops are open on sundays. There is also free streetparking in Malmö City on sundays.
If you are looking for a specific shop you can search in the list below.