Barrett Hayton appeared to cut into the lead with a power-play goal at 1:06 of the third period, but Laviolette successfully challenged that the Coyotes were offside.
"Our breakouts aren't good enough, our forecheck isn't good enough, our neutral zone forecheck isn't good enough," Arizona coach Andre Tourigny said. "It's not that there's a lack of desire by our players but, for whatever reason, we're not as emotionally engaged and intense. … We need to find another gear."
Strome scored at 8:41 for the 4-0 final, his third goal in two games.
"I guess tomorrow the sun will go up and we'll find some positives, but tonight, it's frustration," Tourigny said.
The Coyotes went on the power play twice early in the third but couldn't score and finished 0-for-3.
"We had a few kills we had to take care of starting right from the drop of the puck in the third, and the guys did a great job," Kuemper said. "I was able to see the shots they got, and we were able to keep them at bay, keep them from getting life to get back into the game."
NOTES: Wilson's goal was his second in six games after missing the first three months of the season following knee surgery. ... Lars Eller's apparent goal for Washington that would have made it 2-0 in the second also was overturned on a coach's challenge of goalie interference. ... Capitals forward Anthony Mantha was a healthy scratch for the fourth time in six games. … Washington forward Alex Ovechkin, who didn't score, has one goal in his past seven games after scoring seven over the previous four. … Coyotes forward Lawson Crouse did not play because of an upper-body injury and is day to day. … Arizona is 1-4-0 in its past five home games.