The court in Khartoum commuted Noura Hussein's death penalty to five years as well as ordered her to pay blood money to the husband's family, defense lawyer Abdullah Ibrahim told dpa.
Her sentencing sparked global outrage, with rights campaigners appealing to President Omar al-Bashir to pardon Hussein, saying she was forced into marriage and acted in self-defence.
On the ninth day, Abdulrahman arrived at their flat with some relatives, who tore at her clothes and held her down while he raped her, according to the CNN report.
The following day, he attempted to rape her again and as she struggled to stop him, she stabbed him, killing him.
Hussein said she was betrothed at the age of 16 but refused to accept the union and sought refuge with a relative for three years.
Her lawyers say they plan to appeal both the jail term and the payment.
However, family elders began to insist that Noura and her husband formalise the relationship and behave like a legally married couple.
Hussein, 19, killed her husband whom she alleged had tried to rape her. Her campaign was tagged "Justice For Noura". Amnesty International said Tuesday that over 400,000 people around the world had joined the campaign.
Amal Habani, a Sudanese journalist and women's rights activist, forced and child marriages in Sudan are an ongoing issue women's rights activists have been trying to address.
In a statement, Amnesty International said that Hussein's case must be a "catalyst for change" in Sudan. The law doesn't see that as illegal and neither does it consider marital rape so.
"The Sudanese authorities must take this opportunity to start reforming the laws around child marriage, forced marriage and marital rape, so that victims are not the ones who are penalized".