Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32u0/STM32U031/TIM3/TIM3_CCR2#0x0
TIM3 capture/compare register 2
Low Capture/Compare 2 value
https://github.com/modm-io/cmsis-svd-stm32