Yasin Qasem Muhammad Ismail (Arabic: ياسين قاسم محمد إسماعيلي) is a Yemeni held in extrajudicial detention in the United States Guantanamo Bay detainment camps, in Cuba.

[3] It does include two detainees whose names are near matches: Originally the Bush Presidency asserted that captives apprehended in the "war on terror" were not covered by the Geneva Conventions, and could be held indefinitely, without charge, and without an open and transparent review of the justifications for their detention.

Following the Supreme Court's ruling the Department of Defense set up the Office for the Administrative Review of Detained Enemy Combatants.

[9][12] Scholars at the Brookings Institution, led by Benjamin Wittes, listed the captives still held in Guantanamo in December 2008, according to whether their detention was justified by certain common allegations:[13] Ismail chose to participate in his Combatant Status Review Tribunal.

On April 25, 2011, whistleblower organization WikiLeaks published formerly secret assessments drafted by Joint Task Force Guantanamo analysts.

On February 23, 2009, the Christian Science Monitor reported on an incident that occurred on January 7, 2009, where camp authorities version conflicted with that of Ismail.

[18] Carol Rosenberg, writing for the Miami Herald, reported that Yasin Qasem Ismail participated in a protracted sit-in.

The captives refused to leave their exercise yard, and in contrast to previous confrontations with the camp authorities, they decided to wait out the protesters, rather than resort to violence.