Malaysia is not a party to the Hague Abduction Convention. Malaysia has refused to adopt the treaty, on the ground that it would purportedly contradict Shariah law, since that law bases child custody decisions to a substantial extent on religious, age and gender factors. Given that the Convention has now been signed by more than 90 countries, including some Islamic countries, the failure of a country to join the community of nations in signing and implementing the treaty is a red flag that the country is unlikely to return abducted children promptly, if at all. Further, there are no international or bilateral treaties in force between Malaysia and the United States dealing with international parental child abduction.
In Malaysia child custody cases between Muslims are conducted before Shariah courts. Other cases are conducted before civil courts. However, even in the Malaysian civil courts foreign custody orders are not binding and such courts must review the best interests of the child in any custody case in which a foreign custody order has already been issued. The leading case is Mahabir Prasad v Mahabir Prasad,  2 MLJ 326, in which the Federal Court ruled that the trial court had been committed error by applying the terms of an Indian custody order without conducting a full evaluation of the children's best interests The Shariah courts apply Shariah law in custody cases and foreign non-religious court orders have no role in that process.
The sharp split between the two judicial systems, the Shariah rules that favor Muslims, and uncertain rules and practices as to whether a child may be unilaterally converted to Islam, have provided non-Muslim fathers in Malaysia with a devious ploy to procure sole custody of their children. They convert to Islam, then purport to convert their children to Islam and then petition the Shariah courts for sole custody. Article 121(1A) of the Malaysian Federal Constitution provides that the Civil High Courts in Malaysia have no jurisdiction in respect of any matter that falls within the jurisdiction of the Shariah Courts. This practice has created enormous controversies in Malaysia which have still not been fully resolved.
The case of Indira Gandhi v Mohd Ridzuan Abdullah, concerning a Hindu family in Malaysia, has been pending for at least five years In that case, the father converted himself and his children to Islam, unilaterally removed the children from the family home, and in 2009 obtained an order of sole custody in his favor from a Shariah court. The mother went to the civil court and ultimately, in 2010, obtained an order giving custody to her. The father refused to follow the civil order. Litigation continued and in 2013 the Malaysian High Court at Ipoh declared the unilateral conversion of a child to be unconstitutional. In the same month, however, the Islamic Affairs Department in Seremban, Malaysia declared that the Shariah court had acted properly in granting sole custody to a father who had converted himself and his two Hindu children secretly to Islam. The Court of Appeal then set aside a mandamus order issued by the Ipoh High Court compelling the inspector-general of police to arrest the father, and for him to find and return the child to her mother. The mother's appeal to the Federal Court is now pending.