Here's an ideal itinerary for 3 days in Tunis:

Day 1:

• Start your day with a visit to the Bardo Museum, which is home to one of the world's largest collections of Roman mosaics.
• After the museum, head to the Medina of Tunis, a UNESCO World Heritage Site. Explore the narrow streets and alleyways, and visit the Zitouna Mosque, one of the oldest and most important mosques in Tunisia.
• For lunch, try some traditional Tunisian cuisine at one of the many restaurants in the Medina.
• In the afternoon, visit the Carthage Archaeological Site, which includes the ruins of ancient Carthage, a powerful city-state that was destroyed by the Romans in 146 BC.
• End your day with a visit to the Sidi Bou Said, a picturesque village known for its blue and white buildings and stunning views of the Mediterranean Sea.

Day 2:

• Start your day with a visit to the Bardo Museum, which is home to one of the world's largest collections of Roman mosaics.
• After the museum, head to the Medina of Tunis, a UNESCO World Heritage Site. Explore the narrow streets and alleyways, and visit the Zitouna Mosque, one of the oldest and most important mosques in Tunisia.
• For lunch, try some traditional Tunisian cuisine at one of the many restaurants in the Medina.
• In the afternoon, visit the Carthage Archaeological Site, which includes the ruins of ancient Carthage, a powerful city-state that was destroyed by the Romans in 146 BC.
• End your day with a visit to the Sidi Bou Said, a picturesque village known for its blue and white buildings and stunning views of the Mediterranean Sea.

Day 3:

• Start your day with a visit to the Bardo Museum, which is home to one of the world's largest collections of Roman mosaics.
• After the museum, head to the Medina of Tunis, a UNESCO World Heritage Site. Explore the narrow streets and alleyways, and visit the Zitouna Mosque, one of the oldest and most important mosques in Tunisia.
• For lunch, try some traditional Tunisian cuisine at one of the many restaurants in the Medina.
• In the afternoon, visit the Bardo Museum, which is home to one of the world's largest collections of Roman mosaics.
• End your day with a visit to the Sidi Bou Said, a picturesque village known for its blue and white buildings and stunning views of the Mediterranean Sea.

I hope this itinerary helps you plan your trip to Tunis!