The decision is part of Secretary of State Rex W. Tillerson’s continuing effort to cut the ranks of diplomats and Civil Service officers despite bipartisan resistance in Congress. Mr. Tillerson’s goal is to reduce a department of nearly 25,000 full-time American employees by 8 percent, which amounts to 1,982 people.

To reach that number, he has already frozen hiring, reduced promotions, asked some senior employees to perform clerical duties that are normally relegated to lower-level staff members, refused to fill many ambassadorships and senior leadership jobs, and fired top diplomats from coveted posts while offering low-level assignments in their place. Those efforts have crippled morale worldwide.