16-year-old Joude Souleiman was killed by an Israeli drone strike.
Nabatieh is the second-largest Shiite city in southern Lebanon.
Only a few hundred people remain in the city of 75,000.
Briefing: In Nabatieh, southern Lebanon, 'no one ventures outside anymore apart from rescue teams'
Strategic angle: The ongoing conflict has left the city in despair, with rescue workers facing deadly risks.