Leonard attended Friday's workout but didn't participate. He didn't appear to be walking with a limp.
"It's getting better. I've been at practice, just watching things -- a lot of treatment," Leonard said. "It's frustrating. You work all year to get to this point, and [not] being able to help your team win a game or just being able to play, it's all very frustrating."
He reinjured his left ankle Sunday during the second half of San Antonio's 113-111 loss in Game 1 to the Warriors. Spurs coach Gregg Popovich mentioned after Game 1 that he anticipated Leonard's recovery to take longer than when he originally suffered the injury in Game 5 of the Western Conference semifinals.
Popovich didn't provide any more details Friday, but he added that Leonard's long-term health is "always a factor" in making a final decision.
"Either he's gonna play or he's not," Popovich said. "Everything else, you just work on what you want to work on."
Popovich said Leonard's only participation at the workout on Friday was shooting the ball.
Since Leonard departed Game 1 with 7:54 left in the third quarter, the Warriors have outscored the Spurs 194-133. In Leonard's absence, the team has shot 37 percent from the field, including 8-of-30 from 3-point range, while the Warriors are connecting on 57 percent of their shots, including 24-of-54 from deep.
Leonard admitted the ankle is "still not ready" for action but predicted he "could be feeling way better" on Saturday before Game 3.
"[I'm] just seeing if I can run and at least be myself on the court," Leonard said. "I don't want to hobble around and shoot off-balance shots. I just want to be able to equally push with both legs. We're eight games away from our ultimate goal. So that's just my mindset at the moment, just trying to get better."
For their part, the Warriors believe Leonard will take the court on Saturday.
"I'm sure he's going to play," Kevin Durant told reporters. "It's Game 3 at home. He's had a few days of rest on that ankle, so I know 100 percent sure he's going to play. I haven't talked to anybody, but that's just my gut."
Added Draymond Green: "You're going to prepare for him to play. No doubt in my mind that he'll play. And it's a lot easier to adjust to him not playing then it is to go in with a mindset that he's not going to play then all of a sudden, he's out there. So, we're definitely going in with the mindset that he's playing and we don't expect anything other than that."
Veteran guard Manu Ginobili said the Spurs' mindset won't change heading into Game 3 down 2-0 in the series with the possibility looming that the club could be without Leonard.
"You hope that he's ready and he can help us," Ginobili said. "If he doesn't, we'll try to face the game as if it's a Game 7. We know going down 3-0 will be really tough to overcome. Game 3 is huge. So we had a tough one in Game 2. We struggled in multiple ways, and we really need to take the next one."
ESPN's Chris Haynes contributed to this report.