3 Jazz fans were banned indefinitely for comments made to Morant's parents during Game 2 on May 26 ... with Ja's dad, Tee, telling ESPN the harassment was "straight up disrespectful."

Jazz owner Ryan Smith apologized to the Morants and offered courtside seats, transportation and a hotel to Game 5 for family and friends ... but Tee says Ja's mother, Jamie, will not be in attendance due to their recent experience at Vivint Arena.

"She said her anxiety couldn't take it," Tee told the outlet ... while adding it was a "nice gesture" for the Jazz to offer their services for Wednesday's game.

Tee also spoke about the harassment experienced during Game 2 ... saying, "It was unfortunate. It was just a few fans -- most of them were great and cheering right alongside with us."

Ja denounced the Jazz fans' actions on Twitter last week, saying, "my family should be able cheer for me & my teammates without getting inappropriate s*** said to them."

Smith added ... "Memphis Grizzlies and Morant family... we are embarrassed and sorry. The @utahjazz have zero tolerance for offensive behavior. We are committed to creating a respectful, competitive environment."