Ashley Eastham has returned to parent club Blackpool following the end of his loan deal at Carlisle.
The 19-year-old defender joined the Cumbrians in late November and made one appearance in the 3-2 FA Cup win over Tamworth.
Carlisle boss Greg Abbott told the club's official website: "We are really pleased we've had Ashley with us for this period of time because it has given us the chance to have a look at him.
"We think he's the right age and he has the right type of character, and he is one that we could go back to have another look at.
"The current loan spell won't be extended because I think he will feel that it is better for him to go back to Blackpool, and then to go out somewhere else so that he can get some regular games."