SE Asia Stocks-Singapore leads regional decline; Thai telecoms mixed

BANGKOK, March 21 (Reuters) - Southeast Asian stock markets were mixed on Monday, with stocks in Singapore retreating as investors waited for the 2016 budget announcement later in the week while Thai stocks were little changed amid speculative buying in telecoms shares. Thai SET index was up 0.06 percent at 1,383.79, with shares of telecoms firms among most actively traded. Jasmine International climbed 1.1 percent as investors waited to see whether the telecoms firm will meet the deadin