A snap election is an election that is called earlier than the one that has been scheduled. Snap elections in parliamentary systems are often called to resolve a political impasse such as a hung parliament where no single political party has a majority of seats, when the incumbent prime minister is defeated in a motion of no confidence, to capitalize on an unusual electoral opportunity, or to decide a pressing issue. Snap elections are called under circumstances when an election is not required by law or convention.
A snap election differs from a recall election and by-election in that a completely new parliament is chosen as opposed to merely re-electing individual seats in an already established assembly.