The league's authorities still plan for all 10 La Liga fixtures to take place, including Barcelona's match at home to Real Betis on Sunday.
All games across the top two divisions will be preceded by a minute's silence.
"LaLiga has asked the RFEF (Spanish Football Federation) to hold a minute's silence in all matches of the first day of the competition in LaLiga Santander and LaLiga 1l2l3," La Liga said in a statement.
Barca's players held a minute's silence before training on Friday, whilst the club published a picture of the players and coaching staff with the hashtag "TotsSomBarcelona" ("We are all Barcelona") on its social media channels.
Barcelona's other top flight side Espanyol are away to Sevilla on Saturday.
"With our hearts still shrinking to see Barcelona, our beloved Barcelona, attacked vilely by terror and hate, we want to show our solidarity with all the people affected as well as to thank enormously all the support received by both the city and our club," Espanyol said in a statement.
The league's biggest stars Lionel Messi and Cristiano Ronaldo were among those to lead tributes to the victims as the shocking events of Friday unfolded.
"We are not going to give up, there are many more of us who want to live in a world in peace, without hate and where respect and tolerance are the basis of coexistence."
Ronaldo and his Real Madrid teammates also showed their solidarity with Barcelona as the two clubs' fierce rivalry was forgotten at a tragic time.
"Dismayed at the news coming from Barcelona. All the support and solidarity (to) the family and friends of the victims," Ronaldo wrote on Twitter.
"Today we can't talk about sport," splashed Madrid-based Marca.
Taking a line from Barca's club anthem, Barcelona-based Sport's headline ran "Tots units fem for?a" (together we are stronger).
The first league matches of the season take place on Friday night when Leganes welcome Alaves in Madrid before Valencia host Las Palmas.
Newly-promoted Girona host Atletico Madrid in the first game in Catalonia since the attacks, just over 50 miles north-east of Barcelona on Saturday.
"The most important thing is what happened yesterday," Atletico coach Diego Simeone said on Friday.
"I express my solidarity, sadness and encourage all those that want to live in peace.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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