According to G-Shock.jp, the following G-Shock releases from 2019 have been discontinued and are no longer in production.
This list does not include the designated limited edition (“JR”) models. Most special color releases have a limited production run that eventually ends, but this may not be the case for all special color models, as some may be kept in production indefinitely. Also, discontinued does not necessarily mean unavailable, as there could still be a large supply for the time being, but some models may become increasingly difficult to find in the future.
DW-5600SB-2JF, DW-5600SB-3JF, DW-5600SB-4JF: The translucent blue, green, and red models from the Color Skeleton Series.
GA-140AR-1AJF, GA-700AR-1AJF, GAW-100AR-1AJF, GW-B5600AR-1JF: Four of five models from the Adrenalin Red Series.
GA-700BMC-1AJF, GA-140BMC-1AJF: Two of four models from the Neo Tokyo Series.
GA-140-4AJF, GA-140-6AJF: Red and purple models from the GA-140 debut.
DW-5900RS-1JF, DW-5900RS-9JF, GA-100RS-2AJF, GA-100RS-4AJF: All four models from the Rock Music Series.
AWG-M100SRB-4AJF, GA-110RB-1AJF, GAW-100RB-1AJF: Three of four models from the Red Black Series.
DW-5600SK-1JF, DW-6900SK-1JF, GA-400SK-1A4JF, GA-400SK-1A9JF, GA-700SK-1AJF: All five models from the Clear Skeleton Series.
AWG-M100SBL-1AJF, GA-100BL-1AJF, GA-800BL-1AJF, GAW-100BL-1AJF, GW-B5600BL-1JF: All five models from the ’90s Colors Series.
GBA-800UC-2AJF, GBA-800UC-5AJF, GBD-800UC-3JF, GBD-800UC-5JF, GBD-800UC-8JF: All five models from the G-SQUAD Utility Color Series.
GST-W330L-1AJF: Mid-size G-STEEL with Tough Leather band.
GA-800MMC-1AJF, GA-110MMC-1AJF, GA-700MMC-1AJF, GA-800MMC-1AJF: All four models from the Black and Rose Gold Series.