Is Mass Effect 3 demo still available

After playing the second game of the series I am dying to play the third game. So, I was just searching for any demos or trials for this game in Origin but couldn't find anything. I also had searched in the web and got some results but I am just not confident about them. They could contain viruses and stuff. If there are any demos please reply this with a link of that file (Be sure there are no malwares).