The incident occurred with 43.6 seconds left in the Warriors' 111-101 loss Saturday to the Memphis Grizzlies. Curry tossed his mouthpiece in the general direction of a referee in frustration, while complaining about a no-call on a drive.
As part of the same incident, Warriors forward Andre Iguodala has been fined $15,000 for verbally abusing a game official.
Kevin Durant was also ejected when he joined Curry in arguing with the officials, but the league didn't announce discipline for Durant.
After shootaround Monday, the two-time MVP was optimistic he would not be suspended and would be allowed to play against the Dallas Mavericks.
"Obviously I want to play tonight, and don't think a suspension is necessary," Curry said. "I'm pretty sure, based on the precedent that was set the last time I threw my mouthpiece, that there will be a fine. I hope to be out there playing tonight and help my team get a win."
Curry has been apologetic about the incident.
"I didn't even need to watch it," said Curry, who spent his off day in Dallas playing golf with former President Barack Obama, PGA Tour star Jordan Spieth and his brother, Mavericks guard Seth Curry. "In the grand scheme of things, it's Game 3, we were playing terrible, I was frustrated because I was fouling and I thought I got fouled on the last play. The reaction was definitely a little over the top.
"Stuff happens. I'll try to continue to be myself and show some fire but do it in a way that doesn't take away from the team and misrepresent kind of who I am when it comes to a reaction like that. I don't necessarily think it will be something going forward that you'll see, but you obviously have some regret about going overboard a little bit and lashing out."
Curry has stressed that he did not intend to throw his mouthpiece at the official. He is not sure whether the official thought Curry targeted him with the throw.
"I think once he saw the mouthpiece flying, he was already throwing me out," Curry said. "I don't even know if he knew where it went, let alone where it ended up. I would say I wasn't trying to hit him with it or put him in danger by any type of stretch of the imagination.
"Again, it was a dumb thing to do. It was stupid. Learn from it and try to move on and be better."
ESPN's Tim MacMahon contributed to this report.
Curry ejected for throwing mouthpiece at official
Steph Curry is automatically ejected for tossing his mouth guard at the referee and Kevin Durant is ejected soon after for his choice words. On his way to the locker room, Durant flashes his ring finger to the crowd.