Final answer:
The nurse would need to complete an incident report for a client experiencing a fall with injury.
Step-by-step explanation:
Out of the given situations, the nurse would need to complete an incident report for option 3: a client experiencing a fall with injury. An incident report is usually required when an unexpected event occurs, such as a fall with injury, to document the details of the incident and ensure appropriate follow-up actions are taken. Incident reports help healthcare professionals identify patterns or trends and implement measures to prevent similar incidents in the future.