A beautiful three-year-old boy is dead in Mexico – and all because his mother left him locked in a hot car while she allegedly went out partying.

Little Vicente was found lifeless Saturday in his mom’s car, parked outside a home in Mexicali, the sweltering capital of the Baja California state on Mexico’s northwestern border with the United States.

The little boy was still strapped in his blistering hot car seat, according to NewsX.

Vicente allegedly perished from heatstroke after he was left forgotten in his child seat inside a car by his mother, when she returned home from a party at night and then slept as temperatures rose the next day.

Police were called to Capellania Ave. in La Rioja Residencial, an estate in Mexicali, at around 1:30 p.m. after a woman raised the alarm that a child had been found locked inside a vehicle parked there, the outlet reported.

Officers arrived to find a woman carrying Vicente in her arms and telling them that the motionless toddler was not responding to her cues.

Firefighters and paramedics who examined the three-year-old at the scene confirmed that he had no signs of life, according to NewsX

Forensic officials later revealed that the little boy was killed by heatstroke — after spending more than 12 hours trapped inside his mom’s car.

Forensic Medical Service head Cesar Gonzalez Vaca said an autopsy found no signs of violence on the little boy’s body.

Vincente was a healthy weight and size for his age at the time of his death, according NewsX.

Medical examiners found burns on Vincente’s arms, forearms and thighs, all caused by the intense heat of surfaces and the burning hot air he was exposed to while locked inside his mom’s car.

Police reports said Vicente’s mom left him in his car seat after driving home late from a party on Friday night.

His mother reportedly told officers she had gone to a celebration with the boy and returned home shortly before midnight.

Vincente’s mom then went inside the house and tragically forgot Vicente in the car until the following day, NewsX reports.

The toddler’s body was reportedly discovered around midday on Saturday.

Investigators believe the toddler may have died between 9 a.m. and 10 a.m.

Temperatures in Mexicali soared to up to over 93 degrees while Vicente was trapped inside the vehicle.

Even when outside temperatures are lower overnight, the inside of a closed car can quickly heat up to deadly levels as the day warms, experts warn,

The boy’s father reportedly claimed on social media that Vicente had been forgotten while his mother was under the influence of alcohol, according to NewsX.

That claim has not been confirmed by authorities.

Prosecutors from the Baja California State Attorney General’s Office have opened an investigation into the boy’s heartbreaking death.

Furious locals have called for the case to be investigated as a possible case of neglect.

Children may tragically die if left in unattended vehicles, especially as temperatures rise.

A young Bakersfield mother in February reached a plea deal with prosecutors after her one-year-old son died when she left him in a scorching hot car while she got lip fillers.

Maya Hernandez, 20, will spend a maximum of 15 years in prison after her first-degree murder charge was downgraded to involuntary manslaughter under the terms of the deal.

Hernandez left her two children in the 116-degree heat for over two hours while she got the injections in Bakersfield last June.