Hello! My name is Mostafa; I will assist you today.
I'm sorry that you are experiencing this issue.
Disconnect the power adapter, remove the battery (if it's removable), and hold down the power button for about 15-20 seconds. This will discharge any residual power and reset the power management settings. Then reconnect the battery and power adapter, and try turning on the laptop.
Update BIOS by visiting its manufacturer's website.
Check for Windows updates. Settings(Win+I) > Windows update > Check for Windows update.
Scan your PC with Windows Security or 3rd party antimalware software
Select Start > Settings > Update & Security > Windows Security and then Virus & threat protection.
Check battery health.
https://www.windowscentral.com/how-check-batter...
Boot Windows in safe mode and check still your battery is stuck at 3%; press and hold the Shift key, restart Computer, then Troubleshoot > Advanced option > Startup Settings > Restart.
If that does not help, it might be a hardware issue; please get in touch with Asus support for further assistance. Thank you.
__________________________________________________
Disclaimer - There is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before downloading and installing it.
The above link is in English; you must use Translator to see it in your language.