Suzdal is what is left when a town gets left alone. It was the capital of a principality in the early 1100s, lost that role to Vladimir in 1157, and kept building churches anyway. In the 19th century the main railway went through Vladimir, 35 km away, and Suzdal stayed small. In 1967 it became a museum town with building limits, and today around 9,000 people live among more than 300 listed monuments, including 30 churches and five monasteries. The Kremlin and the Euthymius Monastery are two of the eight monuments of the UNESCO site White Monuments of Vladimir and Suzdal, listed in 1992.
That smallness is why it's three days and not five. The Kremlin, the monastery and the Museum of Wooden Architecture fill two slow days, with meals, a mead tasting and river walks in between. The third day goes to Vladimir and Bogolyubovo, where the finest white stone of the region stands. In November you get snow on the domes, early dusk and few tour buses, and a few exhibitions closed for repair, which the plan works around.
The plan runs outward from the center: the Kremlin and the river (day 1), the monastery, the convent and the wooden museum (day 2), Vladimir and the Church of the Intercession on the Nerl (day 3). Start on a Tuesday: everything is open, weekend crowds are gone and the wooden museum, closed on Mondays, falls on day 2. Moscow is the usual way in, by train to Vladimir and then a bus; pair this with 5 Days in Moscow. Visiting Russia is harder than most countries right now, so read Before you go before booking. More on the country at Russia.