Even though you may have previously agreed to a plan, you can still work with the other parent to modify it if something beyond your control has changed. (springfieldcollaborativedivorce.com)
It's still something beyond his control, something he'd prefer not to deal with if he could fix it. (sbnation.com)
As much as we would like to blame something beyond our control, its just simple math. (scoobysworkshop.com)