Arteta said that Ramsdale will be out of action for the next few weeks with a muscle injury, meaning that he has also been forced to withdraw from the England squad.
Arteta said that Ramsdale had an injury to his oblique muscle and would be out for a few weeks.
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Ramsdale will not play in England's upcoming friendly against Switzerland on March 26 and the one against Ivoir Coast on March 29.
Ramsdale joined the club in August and has enjoyed an impressive debut season in the capital, being an ever present since taking over from Bernd Leno as the club's first-choice goalkeeper.
Ramsdale came in for criticism after being beaten at his near post to allow Diogo Jota to open the scoring in the 2-0 loss to the Reds.
Leno replaced Ramsdale in the starting lineup for the game at Villa Park on Saturday.
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Arteta said that Martinelli was out of the squad because he was sick.
Sky Sports football journalists analyse the key talking points after the England squad was named.