According to Toradayo. magazine vol.103, the third season Shugo Chara!
was announced to start on October 3rd. The title is "Shugo Chara Party!".
Updated on Aug 26
According to Nakayoshi, the new program "Shugo Chara Party!" is composed of an anime part and a live-action part. The title of the anime part is "Shugo Chara!!! Dokki Doki". A short spin-off anime series "Shugo Chara Pucchi Puchi!" will also be started.
Scan of Nakayoshi
Scan2 (the teenage idols of the live action part)