Follow the interviewer. An interruption usually means they want to probe something, clarify your logic, or move the case forward. Trying to force your full prepared structure out can make the interaction feel rigid.

Answer the question directly, then return to the structure only if it is still useful. You can say, "Absolutely. On that point..." and continue. If the interviewer wants the remaining branches, they can ask for them.

The goal is not to deliver a perfect monologue. It is to show structured thinking while responding to the person across from you. Good candidates can preserve the logic even when the conversation changes direction.

Practice interruptions in mocks so you get comfortable pausing and resuming without losing the thread. For the broader interview flow, see the case interview guide.

I used to treat the structure like a speech. Getting interrupted actually became easier once I stopped trying to finish every branch.