Columbia Law School is allowing students to postpone their final exams this month if they feel unnerved by the recent grand jury decisions not to indict police officers in the deaths of unarmed black men.

The policy was announced by the school’s interim dean, Robert E. Scott, in an email on Saturday to the school community. A small number of students have received postponements, a Columbia spokeswoman, Elizabeth Schmalz, said on Monday, though she declined to say how many.

In his email, Mr. Scott wrote that following existing policies for “trauma during exam period,” students who felt their performance could suffer because of the decisions in the Ferguson, Mo., and Staten Island cases could request a delay.

“The grand juries’ determinations to return nonindictments in the Michael Brown and Eric Garner cases have shaken the faith of some in the integrity of the grand jury system and in the law more generally,” he wrote. “For some law students, particularly, though not only, students of color, this chain of events is all the more profound as it threatens to undermine a sense that the law is a fundamental pillar of society designed to protect fairness, due process and equality.”