Kelly was charged by the match review officer for a dangerous tackle on Adelaide youngster Sam Berry in the Eagles' loss at Optus Stadium on Sunday.
Berry was unhurt in the incident but the tackle was still graded as careless conduct, medium impact and high contact.
"Berry was not injured but his head hit the ground with considerable force," tribunal chairman Jeff Gleeson said.
"We find the impact was medium, according to the charge and the ban stands."
The Eagles (2-18) will already be without retired forward Josh Kennedy, who booted eight goals in his farewell match last Sunday.
West Coast remain a chance to secure just the second wooden spoon in their proud history, sitting in 17th on the ladder above North Melbourne on percentage only.
Meanwhile, Carlton will attempt to overturn a two-game suspension for captain Patrick Cripps in the second tribunal hearing on Tuesday night.
The Blues are desperate to have their star midfielder available for season-defining matches against Melbourne and Collingwood.
Cripps was offered the ban for rough conduct on Brisbane's Callum Ah Chee, with his bump leaving the Lion concussed.
The match review officer graded the incident as careless, high impact and high contact.
Carlton midfield star Sam Walsh believes Cripps was unlucky to find himself in trouble.
But the 22-year-old said the Blues would move onto facing the Demons at the MCG on Saturday night if the ban against Cripps stands.
"The way I see it, and I was right in front of it, I just saw it as two guys going really hard at the ball," Walsh said at Ikon Park on Tuesday.
"'Crippa' had his eyes on it the whole time, arms were out stretched and unfortunately in footy you're going to get some big contests and that's what happened.
"There's no doubt that 'Crippa' is a big part for us so hopefully we have him this week.
"A bit of the theme for us the whole year is about the next guy stepping up.
"We've got confidence no matter who's coming into the team, and I think for us we're going to be really bullish about coming out."
Walsh, an emerging leader, expects fullback Jacob Weitering to fill-in as captain if Cripps is not available.
Currently seventh on the ladder with a 12-8 record, the Blues will need to win one of the two matches to secure the club's first finals spot since 2013.
Carlton could still sneak into the top-eight if they lose to both the Demons and the Magpies, but would have to rely on St Kilda and the Western Bulldogs stumbling.
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