もしかしたら

もしかしたら
adverb
perhaps; maybe; possibly
cognitionexpression
See also: もしかして (casual variant), もしかすると (formal/written variant)
1. perhaps; maybe; possibly
expresses uncertainty about a possibility; used when speculating about something that might or might not happen
もしかしたら雨(あめ)かもしれない。
It might rain.
He might not come.
I might be wrong, but let me check.

Common patterns

Usually placed early in the sentence and paired with かもしれない (might be) at the end of the sentence: もしかしたら〜かもしれない.

Forms

Usage

もしかして is often used when realizing something: もしかして、怒(おこ)ってる? (Could it be that you're angry?)