She was convicted in June in the 2014 suicide of her boyfriend, Conrad Roy III, who died of carbon monoxide poisoning in his truck with Carter's encouragement via text messaging.
Michelle Carter has been sentenced to 2.5 months in jail having been found guilty of involuntary manslaughter by a court in MA.
Moniz said that after 15 months behind bars, the balance of her sentence would be suspended until August 1, 2022.
The judge has put Carter's sentence on hold until all of her appeals are exhausted.
The judge called the case, which has garnered worldwide attention, "a tragedy for two families".
Carter's lawyer, Joseph Cataldo, had asked the judge to spare his client any jail time and instead give her five years of probation and require her to receive mental health counseling.More news: Anthony Scaramucci goes to war with Reince Priebus over financial disclosure leak
In dozens of text messages, Carter urged Roy to follow through on his talk of taking his own life.
"She admits in a subsequent text that she did nothing - she did not call the police or Mr. Roy's family", Moniz said in court.
Prosecutor Maryclare Flynn called probation "just not reasonable punishment" for Carter's role in Roy's death.
"Michelle Carter exploited my son's weakness and used him as a pawn in her own little game".
Carter texted things like "just do it babe", "I don't get why you aren't", and - in a moment the judge emphasized in his conviction - "get back in", when Roy climbed out of his truck and said he was afraid. In announcing the verdict, the judge said Carter instructed Roy "to get back into the truck well knowing of all of the feelings he exchanged with her, his ambiguities, his fears, his concerns".
He rejected a theory of involuntary intoxication raised by psychiatrist Peter Breggin, a defense witness who testified that Carter's own medication would have hindered her state of mind.More news: Dubai residents describe screams as flames engulf 79-storey building
She had faced up to 20 years in prison at her sentencing in a juvenile court in Taunton, south of Boston.
On July 12, 2014, a day before Roy was found dead, Carter wrote: "So I guess you aren't gonna do it then, all that for nothing".
Roy had a history of depression and had attempted suicide in the past, but his family was hopeful he would get through it. Cataldo also argued that Carter's words amounted to free speech protected by the First Amendment.
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Carter has received support of her own. He also ordered that Carter not be allowed to profit in any way from the events that led to her conviction. "I do believe she needs help and I do believe she needs to take responsibility for her actions".
It was said she wanted to win sympathy and attention that came with being the "grieving girlfriend".More news: The Daily Telegraph accidentally report the death of Prince Philip
"I would be concerned if you weren't scared, but I know how bad you want this and how bad you want to be happy".