Colback will miss relegation-threatened Newcastle United’s fixtures against Norwich City and Southampton.
The midfielder picked up the suspension after being shown his 10th yellow card of the season in Sunday’s 1-1 draw against former club Sunderland.
Colback – who has been used as a makeshift left-back in recent weeks – was booked for a first-half challenge on Fabio Borini.
“It was going to come at some point,” said the 26-year-old. “I think I did well to get to this game without one.
“It felt like I won the ball, to be honest, but the referee thought otherwise. It’ll be disappointing to miss the two games, but that’s just the way it is. I’ve got to deal with it.”
It's two from three, and here are the fixtures ...
Premier League Standings: Relegation Battle
Pl W D L F A GD Pts
15 Swansea City 31 9 9 13 31 40 -9 36
16 Crystal Palace 30 9 6 15 32 40 -8 33
17 Norwich City 31 7 7 17 32 54 -22 28
18 Sunderland 30 6 8 16 36 55 -19 26
19 Newcastle United 30 6 7 17 29 55 -26 25
20 Aston Villa 31 3 7 21 22 58 -36 16
NEWCASTLE UTD
2 April: Norwich (A)
9 April: Southampton (A)
16 April: Swansea (H)
19 April: Man City (H)
23 April: Liverpool (A)
30 April: Crystal Palace (H)
7 May: Aston Villa (A)
15 May: Tottenham (H)
SUNDERLAND
H West Brom
H Leicester City
A Norwich City
H Arsenal
A Stoke City
H Chelsea
H Everton
A Watford
NORWICH CITY
H Newcastle United
A Crystal Palace
H Sunderland
A Arsenal
H Manchester United
H Watford
A Everton