Midfield stalwart Busquets is due to reach the end of his Barcelona contract at the end of this season, and he has been linked with a move to Inter Miami.
After 15 seasons at Camp Nou, Busquets could elect to finish his career in Major League Soccer with the team part-owned by David Beckham.
His long-standing team-mate Gerard Pique recently retired in mid-season, surprising Barcelona, and the club want to be sure they are aware of Busquets' next intentions.
Cruyff said: "When the World Cup is over, we will talk to him. He's earned every right to decide his future, but the club also needs to plan its squad."
The 34-year-old Busquets remains a key figure for Barcelona and Spain, and for his club, only four team-mates have played more minutes than him so far this season (1,201).
He has played close to 700 first-team games for Barcelona since making his debut in 2008.
Cruyff also spoke about Barcelona's transfer plans for the January window and said it was "clear that there are some positions that we can reinforce."
Spending limits may remain a factor; however, if Barcelona get the go-ahead to make a move, Cruyff said they would not hang about.
"If there is an option to sign, we know what we have to do," he said.
Memphis Depay, who has featured for the Netherlands at the World Cup, has played just 131 minutes for Barcelona this season.
He may be expendable and with his contract due to expire at the season's end, this may be a last chance to receive a transfer fee for the Dutch forward.
Cruyff said: "We are going to see what happens.
"In the summer, he was able to leave but in the end, his departure could not materialise. With [Robert] Lewandowski being suspended for three games, we will see what happens because if there were any injuries, he could be needed."