not the time for, not the place for, far from, anything but, ... is out of the question, ... isn't the word for it
Noun / Verb informal +
This grammar point is used to express that a certain action or state is completely impossible because of a current situation. It emphasizes that the speaker is far from being in a position to do or experience something, often because they are too busy, stressed, or facing a serious problem.
Noun +
When used with a noun, it indicates that the noun represents an activity or state that is currently impossible or inappropriate to consider.
仕事が多すぎて、旅行
I have so much work that it's not the time for a vacation.
忙しくて、昼ご飯
I am so busy I don't even have time for lunch.
Verb informal +
When used with a verb in its informal (dictionary) form, it shows that the action described by the verb is out of the question due to the current environment or situation.
疲れすぎて、勉強する
I'm so tired I'm in no condition to study.
うるさくて、寝る
It is so noisy that I can't even sleep.
This expression is more emphatic than simply saying 'cannot'. It implies that the very idea of the action is absurd or out of the question given the circumstances. While it can be used with nouns and verbs, it is not typically used with adjectives unless they are describing a state that one 'is in no position to be'.