Yes — 3 days is the minimum, and it works well
Three days covers the Colosseum, Vatican, historic centre, Trastevere, and enough pasta to last a lifetime. You'll leave wanting more — which is exactly right.
Ideal 3-day outline
Day 1: Ancient Rome
Colosseum + ForumMorning
Palatine Hill + CapitolineAfternoon
Dinner in MontiEvening
Book skip-the-line Colosseum tickets for 8:30am. Walk through the Forum. Evening aperitivo in Monti neighbourhood.
Day 2: Vatican + Centro
Vatican Museums + Sistine ChapelMorning
Pantheon, Piazza Navona, TreviAfternoon
Trastevere dinnerEvening
Vatican at 8am opening. Afternoon wandering the centro storico. Cross the river to Trastevere for dinner.
Day 3: Neighbourhood day
Borghese Gallery (book ahead)Morning
Testaccio food marketAfternoon
Sunset from Pincian HillEvening
Slower day exploring the city's real life. Testaccio market for the best food. End at Pincian Hill sunset.
💡 Pro tip: Don't add a day trip to Pompeii or Florence in a 3-day Rome visit. You'll spend 5 hours on trains and miss Rome itself. Give those places their own trip.
Bottom line
3 days in Rome is perfect for a first visit. You'll cover the essentials and have the best eating experience of your life. Save the deep cuts for trip two.