The announcement of martial law comes after security forces battled dozens of IS-linked gunmen in a Marawi, a city of about 200,000 people in Mindanao.
The Philippines delegation led by Duterte is on a four-day visit to Russia to discuss deals on security, military cooperation, trade, technology and tourism.
According to Article 112 of Thailand's criminal code, anyone who insults the king, queen, heir or regent will be punished with up to 15 years in prison for each offence.
Under the trade ministerial decree, distributors and warehouses must be registered and declare their stocks to the government every 15th of each month.
The DI, was reportedly affiliated with the Maute Group, whose military authorities confirmed that it has pledged allegiance with the ISIS group network to form a global Islamic caliphate.