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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17. David Moyes (10/1)
A couple of good results has relieved the pressure on Moyes somewhat, however, the relegation battle is such a tight one this year that one or two bad results could drag the Hammers right back into danger. Photo: Ian MacNicol
18. Pep Guardiola (9/2)
The Premier League’s investigation into Manchester City mean Guardiola could be one of the next managers to leave his post. In May, Guardiola said he would leave the club if he felt he had been lied to. Photo: Shaun Botterill
19. Gary O’Neil (4/1)
Up next for Bournemouth, who have lost five of their last six Premier League games, is a clash with Newcastle United and a first return to the Vitality Stadium for Eddie Howe. O’Neil will be feeling the pressure if they cannot pick up their first league win since the break for the World Cup this weekend. Photo: Bryn Lennon
20. Nathan Jones (1/3)
Jones hasn’t been in charge at St Mary’s for too long, however, poor results on the pitch and unrest behind the scenes mean he is now bookies' favourite to be the next Premier League manager to leave his post. Photo: Ryan Pierse