No true "pause & exit" exists. The Sims 3 simulates continuously — closing without saving loses unsaved progress. But you can minimize disruption:
⚠️ Sims still age, needs decay slowly. Best for <5 min breaks.
Save (Ctrl+S) before *any* alt-tab. Even with pause mods. The Sims 3 saves are fragile; a crash = lost hours.
For Long Breaks: Save → Quit to Main Menu → Exit Game. Reload = exact state.