The Third Amendment (Amendment III) to the United States Constitution places restrictions on the quartering of soldiers in private homes without the owner's consent, forbidding the practice in peacetime.

The Third Amendment makes the quartering of soldiers permissible only in times of conflict or war and then only according to the area’s particular laws. The Third Amendment is routinely regarded as one of the least cited sections of the United States Constitution.

Third Amendment, amendment (1791) to the Constitution of the United States, part of the Bill of Rights, that prohibits the involuntary quartering of soldiers in private homes. As a matter of constitutional law, it has become one marginally cited piece of the fabric of privacy-rights jurisprudence.

美国宪法第三修正案，全称是美利坚合众国宪法第三条修正案（英语：Third Amendment to the United States Constitution）禁止军队无论是否战争时期在未经屋主同意的情况下强占民宅。

The Third Amendment prevents government from forcing homeowners to allow soldiers to use their homes. Before the Revolutionary War, laws gave British soldiers the right to take over private homes. The Fourth Amendment bars the government from unreasonable search and seizure of an individual or their private property.