Earlier this month, the same jury found Tsarnaev guilty on all 30 counts, which include the murder of a police officer and other related crimes.
Last week, the jurors were banned from attending this year's race that was held on Monday.
Prosecutors have called for a death sentence for the 21-year-old, who was born in the Central Asian republic of Kyrgyzstan before emigrating to Russia and later to the United States.
Last week, parents of the 8-year-old boy who was killed in the Boston Marathon attack asked the US Department of Justice not to seek a death penalty for Tsarnaev but to opt for life in prison "without any possibility of release."
Capital punishment was declared unconstitutional in the US state of Massachusetts, of which Boston is the capital, in 1984. Tsarnaev is being tried under federal law because of the gravity of his crimes.
Three people were killed and more than 250 injured after Tsarnaev planted two pressure cooker bombs close to the finish line of the 2013 Boston Marathon.
Tsarnaev's older brother Tamerlan, who helped Dzhokhar prepare and carry out the attack, was killed in a police shootout four days after the bombings.