"Since the high in August of 2021, we have actually seen a 71 percent drop," the official said.
The US government has seen a steady downward trend in migration from the three countries last year, the official said.
"All of 2022 was down from 2021, and we have seen in last eight months a month-by-month drop. We are encouraged by these trends," the official said.
However, the number of migrants from other countries in Latin America and the Caribbean has increased during the same time period, the official also said.
"On the numbers of the increase that we saw in 2022, actually it was coming from Cuba, Haiti, Nicaragua and Venezuela in particular," the official added.
The US has faced two record waves of illegal immigration since Joe Biden assumed office in January 2021. Well over two million illegal crossings into the United States were recorded in fiscal year 2022, according to Customs and Border Protection data.