Marsch lasted less than a year at Elland Road after replacing Marcelo Bielsa in the dugout.
He leaves Leeds in 17th place in the Premier League and out of the drop zone only by virtue of goal difference.
Pressure had been building on the American for a while now as he joined Frank Lampard as managers to lose their job so far in 2023.
The crunch end of the season is approaching as managers up and down the division sweat over their future with results becoming more and more crucial as the games tick by.
Here, according to Sky Bet, we take a look at which Premier League managers could be fearing the sack and which are viewed as being relatively comfortable in their current post.
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5. Mikel Arteta (100/1)
Defeat to Everton at the weekend will have slightly dampened spirits at Arsenal, but the Gunners remain runaway leaders at the top of the table. Photo: Stuart MacFarlane
6. Marco Silva (100/1)
Fulham are enjoying a wonderful season under Silva and have banished the demons of their recent failed Premier League adventures. Photo: ADRIAN DENNIS
7. Julen Lopetegui (100/1)
Wolves looked destined for the drop before Lopetegui’s arrival. The former Sevilla man has revitalised Molineux with their win over Liverpool at the weekend a great example of just what a force this team could be under his management. Photo: Clive Mason
8. Erik ten Hag (100/1)
After a disastrous start to life at Old Trafford, Manchester United have improved immensely under the Dutchman and have genuine title aspirations. Photo: Michael Regan