No. Next Community release should be 4.0.a. Due in the summer.
There was a community 3.5.a preview release a while back. It was a quick release pushed out by Alfresco Engineering. As far as I can see it lacked the release process, marketing and documentation, hence the difficulty in finding it. :!: We went from not having previews to having two preview releases back to back.
In fact everything to do with 3.5 is a little bit odd. It's an "Area 51" kind of a release that never happened however the numbering has to fit into the overall scheme of things. As Far as I know (and these things change!) there will never be an Enterprise 3.5 or a Community 3.5. There will be Community 4.0, Team 4.0 and Enterprise 4.0.