Donovan Mitchell is darn good. But he's not Superman like he's shown during the first two games of this series. Thanks to Mitchell averaging 41 points in the series, the Jazz are averaging 114.5 points in the series.
 
I don't see Mitchell and the Jazz keeping up those scoring averages as the series shifts to LA. The Clippers ranked fourth during the season in scoring defense and sixth in defensive 3-point percentage. I don't find Tyronn Lue the sharpest card in the coaching deck, but finally during the second half of Game 2 he found the right type of zone defense to limit Mitchell and the Jazz. Utah was held to 51 points during the final two quarters of Game 2. 
I wonder, too, if Mitchell hurt his ankle after a collision with Paul George late in Game 2. Keep in mind, the Jazz haven't had point guard Mike Conley yet for the series. He's questionable for this Game 3. 

I'm certainly expecting the Clippers to show full playoff intensity defense against Utah.

The Jazz have held the Clippers to an average of 110 points. That's four points below the Clippers' season average. 
Utah has Rudy Gobert, the defensive player of the year, and Bojan Bogdanovic played tremendous defense against Kawhi Leonard during the final quarter of Game 2. George is shooting 12-of-35 from the field in the series. The Clippers can't really rely on others for big-scoring performances besides Leonard and George. 

The Jazz finished in the top-3 in the major defensive categories - scoring, field goal percentage and 3-point percentage. 
So I envision defense ruling the day in this Game 3 matchup.