11:20 AM PT -- Isaiah Stewart's attorney, Alex Spiro, clearly believes the situation has been blown out of proportion, telling TMZ Sports ... "Isaiah was issued a ticket -- not arrested -- and we expect the case to be dismissed."

Spiro also added that I.S. was not put in handcuffs ... and was released after receiving the citation.

Pistons center Isaiah Stewart was arrested for allegedly assaulting Suns forward Drew Eubanks during an altercation before Detroit's game against Phoenix on Wednesday.

The Phoenix Police Department said in a statement the alleged incident occurred in a parking tunnel at Footprint Arena in Arizona at around 4:45 PM -- roughly an hour before tip-off.

Cops said when officers arrived on the scene, they spoke with several bystanders ... who told them the two athletes had gotten into a verbal altercation as they arrived at the arena that turned violent.

"Witnesses said the argument escalated when they saw Stewart punch Eubanks, causing a minor injury," the Phoenix PD said in its statement. "Both men were separated by security which ended the fight."

A short time later, police said they arrested Stewart for assault ... and issued a citation. He was released -- but cops say the investigation remains ongoing.

The Pistons said they were aware of the incident ... adding that they're "in the process of gathering information about what happened and what provoked it, and responding to the NBA and local authorities."

Kevin Durant -- who was traded to the Suns in 2023 -- spoke about the situation after the game ... calling it "unfortunate." He did say, though, the team has Drew's back.

"It’s supposed to be a brotherhood," Durant said. "But I also understand, dudes get into stuff. We try to avoid that in this league, hopefully we can move on from it. We all support Drew."

Stewart -- a first-round pick in 2020 -- is averaging 11 points and 6.8 rebounds per game this season. He gained national notoriety in 2021 after he got into a physical altercation with LeBron James on the court.

Eubanks, meanwhile, signed with the Suns last year after playing for the Blazers and Spurs. He's currently averaging 5.7 points per game.