Mark Trumbo and Jake Lamb also drove in runs for the Diamondbacks (53-71).
"It was a bad thing that we couldn't keep them close," Inciarte said. "We've got to be able to give ourselves a chance to in the game."
Giancarlo Stanton hit his major league-leading 32nd homer and drove in four runs for the Marlins.
Stanton has a career-high 88 RBI, one more than he had in 2011. He went 7-for-14 with four walks and six RBIs in the four-game series against Arizona.
Garrett Jones also homered for the Marlins, who have won five of seven to get back to the .500 mark at 62-62, equaling their victory total for all of last year.
Marcell Ozuna and Jarrod Saltalamacchia each drove in two runs and Christian Yelich had three hits.
Tom Koehler (9-9) pitched six innings, allowing two runs.
Stanton hit a three-run homer and Jones also connected in the first against Josh Collmenter (8-7).
Trumbo and Lamb hit RBI singles in the sixth that pulled Arizona within 5-2.
The Marlins broke open the game by scoring five times in the seventh. Stanton hit an RBI single, Ozuna had a two-run double and Saltalamacchia singled home two runs. Diamondbacks reliever Randall Delgado was charged with five runs and got just one batter out.
This was Miami's highest-scoring game since an 11-6 win at Tampa Bay on June 5.
Diamondbacks: RHP Daniel Hudson (Tommy John surgery) threw one scoreless inning on Saturday night in the Arizona League, allowing one hit and striking out one.
Diamondbacks: Arizona travels to Washington for a four-game series beginning on Monday night. LHP Vidal Nuno (0-3, 3.92) starts against Nationals RHP Jordan Zimmermann (8-5, 2.92).
Collmenter also allowed seven hits and walked a batter while striking out four.
"He just didn't seem to be himself today," Gibson said. "He told me (in the dugout) he was just a little sluggish and said he wasn't throwing the ball like he could. We'll adjust his routine and try to get him freshened up."