Department of Homeland Security: Border Security Status Report: Third Quarter, Fiscal Year 2018 (Fiscal Year 2018 Report to Congress) [open pdf - 1MB]
From the Legislative Language: "This report has been prepared pursuant to the direction in the Joint Explanatory Statement accompanying the Fiscal Year (FY) 2018 Department of Homeland Security (DHS) Appropriations Act (P.L. 115-141). The Joint Explanatory Statement includes the following provision: The Department shall continue to submit quarterly Border Security Status reports and data on the deportation of parents of U.S.-born children semiannually, as in prior years."
U.S. Department of Homeland Security: https://www.dhs.gov/