Two goals from Suàrez saw off Real Madrid to put Barcelona into the Copa del Rey Final in a 3-0 semi final second leg win at the Bernabeu.
Real Madrid were ahead on away goals, after a 1-1 draw at the Nou Camp at the start of the month, however they had no answer to Barcelona's second half onslaught and Ernesto Valverde's side will now contest a sixth successive Copa final.
It was the efficiency of Suàrez after the break that was decisive, for his sixth goal in his last seven El Clàsico appearances.
Santiago Solari's side looked to react, but the game was put beyond them on 69 minutes, as Raphael Varane turned Dembélé's teasing cross into his own net - with Suàrez lurking for a tap in.
The Uruguayan international then put the game beyond any doubt, converting a cheeky dinked penalty after he was fouled by Casemiro.