Apparently there is an OK 3 BYPASS designation in Atoka that is not on Google Maps. It uses Greathhouse Dr, a N-S oriented street on the west side of Atoka, and is multiplexed with OK 7 east to US 69/75. A check of the signage on GSV shows that some of the signage does not have the BYPASS plaque above it.
ODOT's City/County maps show it as "3B". Oddly they show the old OK 3 (Court St) on the east side of town as still being on system.
Atoka:https://www.google.com/maps/@34.3897669,-96.1140395,5631m/data=!3m1!1e3 (https://www.google.com/maps/@34.3897669,-96.1140395,5631m/data=!3m1!1e3)
Inconsistent signage in Oklahoma? Why, I never!