The walk-in clinic at the Gilbert Bain Hospital on Saturday (8th October) has been cancelled.
NHS Shetland said this is due to staffing issues.
Patients who require emergency treatment that cannot wait until Monday should ring NHS 24 for advice and assistance.
The NHS 24 number is 111.
NHS Shetland apologies for the inconvenience to patients.
Anyone with queries should ring (01595) 743064/3069.