Ousmane Dembele has come to Barcelona's rescue for a second time in Spain's La Liga this season with the France forward scoring a second-half winner to complete a 2-1 comeback victory at Real Sociedad.
Dembele was quickest to a poor clearance of a corner kick in the 66th minute, rifling a left-footed shot through a crowd of players and past goalkeeper Geronimo Rulli.
The goal gave the defending champions four wins in as many rounds to be top of the leagie alone, two points ahead of Real Madrid who drew 1-1 at Athletic Bilbao.
Dembele also scored winning goals for Barca in a 1-0 victory at Valladolid in round two.
His goals are beginning to silence his critics at Camp Nou after an injury-hit first season left many of the club's fans wondering if he could adapt to Barcelona's demanding passing style.
He managed only four goals in 23 appearances in his first campaign after Barcelona paid a then club-record transfer of 105 million euros ($A170 million) for him in 2017.
Suarez started Barcelona's fightback three minutes before Dembele scored, cancelling out Aritz Ilustondo's first-half goal for Sociedad.
"These are the kinds of matches that decide "a Liga," Suarez said.
"It's a huge win for our confidence."
Real Madrid finally missed the goals of former star Cristiano Ronaldo when their attack failed to produce at Bilbao.
Karim Benzema and Gareth Bale have combined for seven goals through Madrid's wins in the first three rounds but neither threatened Bilbao's net on Saturday.
Bale instead turned provider for substitute Isco to head home a 63rd-minute equaliser.
That second-half goal salvaged a point and cancelled out Iker Muniain's first-half goal for the hosts.
"We improved in the second and had the chances, but we were lacking that scoring touch," Madrid coach Julen Lopetegui said.
Teenager Borja Garces enjoyed a promising debut for Atletico Madrid, scoring with the final kick of the match to salvage a 1-1 home draw with Eibar.
The stalemate left Atletico with just one win and five points from their four games.
"It was a bittersweet debut, you can say, since we didn't get the win," the 19-year-old Borja, who was a 71st-minute substitute, said.
Sergi Enrich scored on 87 minutes to give Eibar what they through was a late winner.
Valencia remained winless after being held to a dull 0-0 draw at home by Real Betis.
Los Che finished the league in fourth last season to make a long-awaited return to the Champions League, which starts mid week at home to Juventus.