Thank you for reaching out. I can certainly understand your frustration with your Gear S3 being stuck in a boot loop and would be happy to assist you further. Apps you download and install onto the watch can cause the watch to get stuck in a boot loop or not boot past the logo screen. Rebooting it should fix the problem, but you will need to uninstall any apps that were installed before the issue occurred. If the watch is connected to a phone, you must clear the data for the Galaxy Wearable app. If the problem continues, inspect the watch and charger for damage, and factory reset the watch. Give this link a try for troubleshooting steps on your smart watch being stuck in a boot loop: https://www.samsung.com/us/support/troubleshooting/TSG01003223/
If you have tried all the troubleshoot steps and are still experiencing these symptoms, regretfully based on the date of production the device has reached end of life status. This means that any repairs would be beyond economical repair, and it is recommended to seek other options with your retailer or carrier.
