Take a look at the official tweet below:
Hey Simmers. Confirming all the rumors. Yes, The Sims 4 will be at E3.
— Rachel Franklin (@SimGuruRachel) April 23, 2014
The Sims 4 is expected to release this Fall for PC after a delay. E3 2014 will take place in Los Angeles from June 10 through 12.
Source: Rachel Franklin