I hand 3 beers 48 hours ago will it show up on a EtG test

This sort of question is asked frequently on our site. The short answer is "maybe".

Check out these links:
https://www.askmehelpdesk.com/addictions/had-2-beers-37-hours-ago-will-pass-etg-628516.html

https://www.askmehelpdesk.com/medical-science/will-pass-etg-test-if-drank-6-7-shots-vodka-2-3-beers-54-hours-ago-564702.html

https://www.askmehelpdesk.com/addictions/etg-ets-test-4-beers-36-hours-clean-window-624042.html

https://www.askmehelpdesk.com/addictions/12-beers-72-hours-later-etg-test-cutoff-500-ethyl-glucurinide-250-ethyl-sulfate-100-a-464342.html

Given the amount consumed and the time span it is unlikely that EtG would still be present.

NOTICE: Any person or entity that is subjected to or relies on EtG testing should read the Advisory issued by the US Department of Health and Human Services, 10/ 2006 in effect as of date of this posting. Full copy available here > EtG, biomarkers (http://kap.samhsa.gov/products/manuals/advisory/pdfs/0609_biomarkers.pdf)

Ref: Helander, 2004 (http://www.clinchem.org/content/50/5/936.full.pdf) (3 drinks)