This pattern expresses that something is completely out of the question because of the current circumstances. It often carries a tone of frustration or urgency. For example, if you're swamped with work, you might say you're not in a position to take a vacation — 旅行どころではない. It can also mean 'not just X, but even more so' when the following clause describes a more extreme degree of the same quality.

Use it with verbs in their dictionary form (e.g., 行くどころではない), nouns directly (e.g., 休みどころではない), or な-adjectives (e.g., 静かどころではない). It's common in spoken Japanese when complaining about a busy or difficult situation, but it's not overly casual; it works in both speech and writing.