The French translation for “in case of a problem” is en cas d’empêchement. The French, en cas d’empêchement, can be broken down into 3 parts:"in" (en), "case" (cas) and "of a problem" (d’empêchement).
Examples of "in case of a problem" in use
There is 1 example of the French word for "in case of a problem" being used: