"I think it's unfortunate he lost his seat, because of the two drivers [alongside team-mate Lance Stroll] he is the higher-performing driver.
"But as we know his father doesn't own the racing team, so when they wanted to bring in Vettel, it was clear Perez was going to be the guy to go.
"I think he'll probably end up at Formula 1 is my guess, at either Haas or Alfa Romeo, but if he had an interest in IndyCar, I think he's a great race car driver and we would definitely be interested in talking to him."
The Arrow McLaren SP team currently has Perez's compatriot Patricio O'Ward and American Oliver Askew on its books.
Brown has confirmed that running a third car is not viable at present, but given the financial support Perez has behind him, and other factors, it is not beyond the realms of possibility.
"We would need the funding for three cars, and at this point, we only have the funding for two cars, so we wouldn't be in a position to sign him today," added Brown.
"It would be something that, between the backing he has historically had and the commercial activity that we've got going on and the excitement that someone like Sergio would create, we would certainly look to see if we could put it together."
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