The Idaho Falls and Ammon Walmart stores are no longer open 24-hours.
Both stores will now only be open from 6 a.m. until midnight.
The Chubbuck Walmart made this change during the summer.
Dozens of Walmart supercenters across the nation have been making the change after looking for ways to optimize store labor in accordance with peak shopping periods.
Some employees believe theft issues have also led to the change.
In previous cases like this, Walmart has said most of the overnight workers will be retained for stocking and prepping the store for daytime hours.