Camp East Montana on the Fort Bliss U.S. Army base in El Paso.Paul Ratje / Reuters file

A third undocumented immigrant detained at a sprawling tent camp in the Texas desert has died, U.S. Immigration and Customs Enforcement announced Sunday, the third such death in 44 days.

Camp East Montana on the Fort Bliss U.S. Army base in El Paso is one of the largest ICE detention centers in the nation, with 2,903 detainees as of Jan. 8, according to the law enforcement agency`s data. The facility is a soft-sided tent-style structure, which ICE increasingly favors over brick-and-mortar buildings as it ramps up immigration enforcement.

ICE identified the detainee as Victor Manuel Diaz, a 36-year-old from Nicaragua who first encountered ICE officers in Minneapolis. He was pronounced dead at 4:09 p.m. on Jan. 14 after contract security staff found him "unconscious and unresponsive" in his room, the agency said in a news release.

"He died of a presumed suicide; however, the official cause of his death remains under investigation," ICE said in the release. ICE did not immediately respond to an email asking why the agency presumes Diaz died by suicide.

In recent months, members of Congress have raised concerns about safety at the facility, which opened in August. President Donald Trump has pushed for mass deportation of immigrants who are in the country illegally, and his administration has dramatically increased ICE detentions.

Francisco Gaspar-Andres, a 48-year-old Camp East Montana detainee from Guatemala, died at The Hospitals of Providence East, a general hospital in El Paso, on Dec. 3. In a Dec. 5 news release, ICE said his cause of death was pending, but "medical staff attributed it to natural liver and kidney failure."

Geraldo Lunas Campos, a 55-year-old from Cuba, died in custody Jan. 3 after experiencing what ICE characterized as "medical distress." Lunas` cause of death was under investigation, the agency said in a Jan. 9 news release.

In a news release, ICE said staff observed Lunas in "distress" while he was placed in "segregation," meaning he was housed separately from the facility`s general population. ICE`s statement said Lunas was put in segregation after he "became disruptive while in line for medication and refused to return to his assigned dorm."

"Medical staff responded, initiated lifesaving measures, and requested emergency medical services. Lunas was pronounced deceased by EMS," ICE said.

NBC News has contacted the medical examiner in El Paso County for more information on the cause of death for all three detainees but has not received a response.

In a statement, ICE said in part that it is "committed to ensuring that all those in custody reside in safe, secure and humane environments."