The sheriff tweeted shortly before 11 a.m. that deputies responded to a crash in the 18300 block of East Laura Shore.
Preliminary information was that a resident was backing out of the driveway and hit the child.
However, the sheriff later provided an update that a mother had just arrived home was unloading her SUV and inadvertently left the vehicle in neutral.
The mother and her three children then exited the vehicle, when it rolled back and struck her 3-year-old daughter.
The girl was transported to Memorial Hermann Hospital by Cyfair EMS where she later died.
The case is being investigated by the Harris County Sheriff's Office Vehicular Crimes Division.
Heartbreaking update: the child was pronounced deceased at the hospital. It appears a parent arrived home, began unloading the car, inadvertently left the vehicle in neutral. Vehicle rolled back striking 3-yr-old daughter. Our prayers go out to this family. #HouNews https://t.co/tbsvY28AtY— Ed Gonzalez (@SheriffEd_HCSO) January 25, 2020