In a system, apparatus, method, and non-transitory computer readable medium for implementing SL DRX reconfiguration for SL groupcast based on congestion control, a UE device may be caused to, obtain sidelink (SL) groupcast configuration information associated with a desired UE group, the SL groupcast configuration information including a SL discontinuous reception (DRX) cycle and at least one setting rule regarding the SL DRX cycle for the desired UE group, the SL DRX cycle including a SL DRX ON duration setting, determine whether a congestion level of the desired UE group for a current SL DRX cycle period exceeds a desired congestion threshold level, determine SL DRX reconfiguration settings based on results of the determining whether the congestion level exceeds the desired congestion threshold level and the setting rule, and perform SL DRX communication based on the determined SL DRX reconfiguration settings.