Use the agenda as a reference to determine whether the unexpected topic is relevant to the purpose or goals of the meeting. If it is, consider adding it to the agenda as a new item or integrating it into an existing item.
If the unexpected topic is not directly related to the purpose or goals of the meeting, consider setting aside time at the end of the meeting for open discussion or allowing attendees to bring up unplanned topics during the meeting, as long as they are relevant and appropriate.
If the unexpected topic is urgent or important, consider interrupting the meeting to address it immediately. This will help ensure that the issue is resolved in a timely manner and that it doesn't distract from the rest of the meeting.
If the unexpected topic is not urgent or important, consider deferring it to a later meeting or setting up a separate meeting to address it. This will help ensure that the main agenda is not disrupted, and that the topic can be discussed in more detail at a later time.
Overall, it is important to remain flexible and adaptable when unexpected topics arise during a meeting with an agenda. By using these strategies, you can ensure that the meeting remains focused and productive, while also addressing any unplanned or unexpected issues that arise.