The Celtics lost to the Jazz on Friday night. It's the first time Boston has dropped three in a row at home since 2018.

BOSTON –- More than two years had gone by since the last time the Celtics lost three straight home games.

It had not happened since just before the All-Star break in February 2018 when the Celtics dropped three consecutive TD Garden games to the Indiana Pacers, Cleveland Cavaliers and Los Angeles Clippers.

Over the last seven days, however, the Celtics lost three Garden games in a row, starting with an overtime defeat to the Houston Rockets last Saturday and an ugly double-overtime loss to the Brooklyn Nets on Tuesday night.

Those extra-session setbacks were followed by a 99-94 loss to the Utah Jazz on Friday night on the parquet floor, dropping the Celtics to 23-8 at home.

The Celtics were without Jaylen Brown (right hamstring strain) and Gordon Hayward (right knee contusion) for the second game in a row. Kemba Walker (sore left knee) continued to have his playing time restricted and played 26 minutes and 31 seconds.

The Jazz, who trailed by 11 points in the first quarter, used sizzling 3-point shooting in the second quarter to take control of the game. Utah hit 8 of 11 shots from long distance in the quarter when they opened a 62-49 lead at the break.

The Celtics got as close as five in the third quarter and seven in the fourth quarter, but the struggles of the offense (37 percent, 10 for 36 on 3-pointers) prevented them from catching the Jazz.

Coach Brad Stevens said the effort by the Celtics was better than it was in the loss to the Nets, but Marcus Smart did not feel the same way.

“I disagree,’’ said Smart. “Our effort was (expletive). We gave them the first couple of punches, and then after that, our effort died down. We picked it up towards the end, but it was too late at that time. We definitely couldn’t make shots. We’ve got to move on from it. The game’s over.’’

Smart, on his 26th birthday, led the Celtics with 29 points, but he was just 9 for 23, including 6 for 15 on 3-pointers.

Walker missed his first five 3-pointers and finished with 13 points on 5 for 17 shooting, going 1 for 7 on 3-pointers. Jayson Tatum had his streak of scoring at least 30 points stopped at five games when he was held to 18 points on 7 for 19 shooting.

The Jazz avenged a recent loss to the Celtics despite the fact that Donovan Mitchell made only 3 of 15 shots and scored 11 points. Mike Conley led the way with 25 points, hitting six 3-pointers.

Utah’s bench outscored the Celtics, 39-13, with Brad Wanamaker getting nine of Boston’s points.

The Celtics made a run early in the second half to get within five points, but after that, they could only get as close as seven (96-89) with 1:50 remaining in the game on a three-point play by Tatum.

The Jazz were behind by 11 in the first quarter before turning things around in the final two minutes, then never trailed after the opening minute of the second quarter.

“We were playing out of our minds (at the start of the game),’’ said Stevens. “We made every shot. But they were making shots, too. It felt a little like fool’s gold. You knew they were going to come back and their bench is really good.

“We had a number of good stretches during the game, but it wasn’t good enough to beat them tonight.’’

After scoring only 20 points in the second quarter, the Celtics were limited to 17 in the third quarter and were behind, 79-66, going into the final 12 minutes.

Trailing by 16 when Conley opened the second half with a 3-pointer, the Celtics went on an 11-0 run to close the gap to 65-60 with 8:27 left in the third quarter. The Celtics scored five points in the final 6:20, missing 19 of 25 shots and going 2 for 11 on 3-pointers in the quarter.

The Jazz finished the quarter by outscoring the Celtics, 13-5, and Jordan Clarkson made a basket with 3.6 seconds to go for the 13-point lead.

Six different players hit long-range shots in the quarter for the Jazz with Conley and Joe Ingles hitting two each.

The Jazz were behind by 10 points with less than three minutes to go in the first quarter, then outscored the Celtics, 40-14, over the next 12 minutes to open a 59-43 lead.

Walker played only 12 first-half minutes and had 6 points while Smart had 15 to lead the Celtics.

Hitting 10 of their first 12 shots, the Celtics were in front, 25-16, with 5:12 to play in the quarter. Smart hit three straight 3-pointers over a span of 1:08.

The lead was 29-19 with 2:24 remaining after Tatum scored, but the Jazz finished the quarter by scoring 11 straight points in 2:08 to take the lead. Four different players notched points with Conley converted a three-point play.

Jim Fenton may be reached at jfenton@enterprisenews.com. Follow him on Twitter at @JFenton_ent.