Sabir Mahfouz Lahmar (born May 22, 1969) is a Bosnian citizen, who won his habeas corpus petition in United States federal court after being held for eight years and eight months in the military Guantanamo Bay detainment camps, in Cuba.

[4] Lahmar worked for the Saudi High Commission for Relief of Bosnia and Herzegovina, an aid organisation shut down in October 2001 for alleged support of Islamist terrorism.

These hearings were designed to assess the threat a detainee might pose if released or transferred, and whether there were other factors that warranted his continued detention.

In 2008 it ruled on them together under Boumediene v. Bush, deciding that detainees and foreign nationals were covered by constitutional protections allowing them to sue for habeas corpus.

[11] Noting that Lahmar would "finally begin to live a normal life again", the French foreign ministry pledged to help re-integrate him into society.