그냥 놔둬.

A: Sam looks pretty put-off. Is something under his skin?
B: He’s just having one of those days. He’ll snap out of it.
A: Would it do any good if I had a chat with him?
B: I doubt it. 그냥 놔둬. for a little while.

A: 샘이 기분이 안좋아 보이는데, 뭔가 안좋은 일이 있나?
B: 그냥 컨디션 안 좋은 그런 날이겠지. 곧 괜찮아 질거야.
A: 내가 얘기를 좀 해보면 나아질까?
B: 아닐걸. 잠시 Give him some space.

[Additional expressions]
*Sam looks pretty put-off.
– Sam seems to be pretty angry. / It looks like Sam is quite upset.
*Is something under his skin?
– Is something bothering him? / Is he dealing with a problem?
*He’s just having one of those days.
– He’s simply having the kind of day when everything goes wrong.
*He’ll snap out of it.
– He’s bounce back. / He’ll be all right. / He’ll be back to normal, soon.
*Would it do any good
– Would it help / Do you think it might be helpful to him
*if I had a chat with him
– if I sat him down for a little talk / if I were to try to talk with him about it
*I doubt it.
– I don’t think that would help. / I don’t believe so. / Probably not.
*Give him some space for a little while.
– Let him alone for a bit. / He needs some alone time.