Short answer: No.

• Attham (Aatham/Attham tap) means a continuous 3‑day fast completed with one parna at the end. It is not a total made by adding separate one‑day fasts. To be Attham, there should be no parna (no breaking the fast with food) between the three days.

• Tivihar Upvas: fast without food; boiled, filtered water is allowed only in prescribed daylight hours.
• Chauvihar Upvas: fast without food and without water (nirjal) for the whole period.

So, “2 Tivihar Upvas + 1 Chauvihar Upvas” are three separate upvaas. They become Attham only if all three days are kept continuously without parna in between.

Tradition notes

• Shwetambar: Tivihar generally allows only boiled water in daytime; Chauvihar is without water. Attham = 3 continuous days.
• Digambar: Greater emphasis on nirjal; local maryada may vary, but Attham is still a continuous 3‑day fast.

Helpful explanations:

• Difference between Tivihar and Chauvihar
• What is “Attham”?