The Colombia international left the action after 20 minutes of the Eagles’ 2-0 win over Leicester City at the King Power Stadium in midweek.
Speaking in his pre-match press conference, Glasner confirmed that Lerma would not be available for Saturday’s trip to West Ham United due to illness.
The manager said: “Jeff Lerma is not available tomorrow – he is sick – but all the others who played at Leicester look quite good.
“We’ve a little small question [mark] about Ismaïla Sarr. He’s suffering a little bit with tightness in his hamstring, but we will take the final decision tomorrow.
“But all the others are fine.”
Expanding on Lerma’s illness, Glasner noted: “We thought that he could be back today maybe, but then he didn’t really feel well, so then we decided it makes no sense.
“He feels a lack of power, and then we said: ‘Okay, we have to wait.’ We had to take him off after 20 minutes at Leicester and then he felt unwell, and this is what happened.”
Match Details
- Saturday, 18th January
- 15:00 GMT
- Premier League
- London Stadium
- Live audio commentary on Palace TV+