"According to the entry on Saudi Arabia in Country Reports 1998: "Conversion by a Muslim to another religion is considered apostasy. Public apostasy is a crime under Shari'a law and punishable by death" (1999). This was corroborated by information supplied by the Canadian mission in Abu Dhabi, transmitted via the Refugee Branch Asylum Division of Citizenship and Immigration Canada:

The punishment for apostasy (riddah) is well known in Islamic Sharee'ah. The Saudi government is one of the few countries in the Islamic world that fully implements the full Sharee'ah law. This includes the punishment for apostasy.

The one who leaves Islam will be asked to repent by the Sharee'ah judge in an Islamic country; if he does not repent and come back to the true religion, he will be killed as an apostate. (23 Feb. 1999)"

Source: Immigration and Refugee Board of Canada