1) On your watch you MUST select a different watch face to be displayed that is NOT the one you want to uninstall.
2) Using your watch - MOST watch faces are developed by independent developers and not Garmin, and therefore you might not be able to uninstall / Delete them from the watch using the watch
a) Long press the Menu button
b) Select the watch you want to uninstall
c) If you only get the option to Apply go to 3) or 4)
d) Select Delete
The watch face will be deleted
3) Using the Garmin IQ App
a) Make sure your watch is connected to the Device with the App - usually your phone
b) Open the App
c) Select Device at the bottom
d) Select My Watch Faces
e) Select the watch face you want to Uninstall
f) At the top there are 3 dots, press on them
g) Press on Uninstall
h) A pop up will appear asking if you want to uninstall the watch face
I) Select Uninstall
The watch face will be Uninstalled
4) Using Garmin Express
a) Make sure your watch is connected to the Device with the App - usually using a cable to a computer
b) Open the Garmin Express software
c) Select the Watch you have connected
d) Select Apps
e) Scroll down until you find the watch face you want to uninstall
f) Select the X
g) It will come up with Removed and the X will be replaced with a download cloud
The watch face is now Uninstalled
If you have any issues with the above then refer to your watch user manual
And if that still does not help, then contact your Garmin support