In this year, Qt3 has got a few QA uploads with the most relevant change being support to multiarch. And, more importantly, nobody seemed to care enough to step into maintaining it.
In the last days, I have taken a look into how much needed to be done to remove Qt3 and there were slightly more than 50 packages depending directly or indirectly from Qt3. A removal from Wheezy seemed doable given that removing packages is never a problem during the Debian freeze ;-)
All the packages affected have a bug opened since more than one year and half ago and I have pinged all the bugs with some maintainers responding quick (thanks!). I also filed some removals for packages that were clearly unmaintained and didn’t seem worth keeping, with ftp-masters responding quick too (Thanks!). And finally, a couple of QA upload for orphaned software that were still useful without Qt3.
There is a wiki page tracking the status of the removal if you are curious:
If in the future, you are reading this and you need Qt3 in Wheezy, you can fetch it from Debian snapshots.