Any update on when the 2013 ACS multi-year data will be released?
While there is no current estimated release date for these samples, it is likely they will become available this coming fall. However, because the multi-year data files are simply a concatenation of the single-year ACS data files, you can construct the multi-year files yourself. Please see this answer for more details on how to do so.
Hope this helps.
A previous answer to this question (Feb. 11, 2015) stated that the 2013 3-year file would probably come out around April 2015. If this is data is not coming out until Fall, is that a new schedule for multi-year data release or is that an anomaly?
This year the IPUMS-USA team is working on improving their data creation process, so the delayed release of the multi-year ACS files is an anomaly. The February answer was conveying that the files would not be released before April (i.e. in February or March), but the actual month of release was still unknown. Sorry for any confusion caused by the previous answer.
Hope this helps.