James Clarke will be unavailable for Newport as they prepare to face Bristol Rovers on Saturday.
The 32-year-old defender was given his marching orders when he was shown a second yellow card in the 84th minute of their 1-1 draw with league leaders Forest Green.
County boss James Rowberry faces a defensive injury crisis, with Priestley Farquharson (knee) ruled out for the season and Josh Pask (hamstring) sidelined until April.
Midfielder Robbie Willmott is also facing a spell on the treatment table with a calf injury.
Sam Finley could return for Bristol Rovers for their trip to south Wales.
The 29-year-old midfielder was an unused substitute in Rovers’ 1-0 win over Barrow in midweek after recovering from a viral infection.
Midfielder Jon Nolan was also an unused substitute and is yet to make his bow for Joey Barton’s side.
Defensive duo Josh Grant and Alfie Kilgour remain sidelined.
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