According to AsiaOne online news portal, four Olympic sport disciplines are set to be dropped from the 27th South East Asian Games competition which is to take place in December this year in Myanmar. The four disciplines notably missing are: Badminton, Tennis, Table Tennis and Gymnastics. From the article by Lim Say Heng (which you can see at http://news.asiaone.com/News/Latest%2BNews/Sports/Story/A1Story20130127-398208.html:

The four sports were among the 31 confirmed at the first SEA Games Council meeting held in the Myanmarese capital Naypyidaw last July, with the inclusion of seven sports - fencing, fin swimming, hockey, petanque, soft tennis, tarung derajat (an Indonesian martial art) and vovinam (a Vietnamese martial art) - to be discussed in a meeting next week.

The various National Olympic Committees received an updated list earlier this week in preparation for the meeting, with the four Olympic sports conspicuously absent.

Singapore National Olympic Council secretary general Chris Chan has sent the local organisers a letter on this matter, with several other countries lending their support.

Chan said: "Nothing has been finalised yet. As with many previous Games, there's always room for discussions and I brought the matter to the attention of the local organisers, which elicited responses from other countries as well.

Here is hoping that this was just an oversight and that Gymnastics is once again included in the programme. Also from the above article:

Veteran gymnast Lim Heem Wei added: "It's quite sad because these are all our core sports, especially table tennis, and we would lose out in the medal count if that happens.

"But we haven't gotten any official notification about this yet and we will just keep training.

Hopefully, we will be able to go for the Games."