The data showed on Friday that some 155,821 migrants were released in September.
The releases include migrants who qualified for parole or were given notices to appear for their immigration court proceedings.
The Biden administration witnessed its third-consecutive record of yearly illegal crossings by migrants on the US southern border in fiscal year 2023.
According to CBP data, some 2.4 million illegal migrants were encountered on the US southern border this fiscal year, which is measured from October 2022 to September 2023.