No version I consulted, nor NICOT, makes "I set a stumbling bloc" the
result of the preceding clause. All make it part of the protasis, and
only "he will die" as the apodosis. I have followed the placement of
the zaqeps and 'athnach for the logic of the second sentence.
I have changed ULB and UDB to follow NIV and NLT. ESV and NAS take the
parenthesis to be a quotation from an unnamed speaker, probably one
whose voice is like an earthquake. NET and NRSV take the sound to be
that of Yahweh rising from his place. The alternatives not handled by
U?B are dealt with in the notes.
The הזאת is problematic: "he fed me this scroll," which is what it
looks like at first blush, is awkward English, and probably awkward,
period, hence its absence in LXX. I’ve followed Keil and Delitzsch
(http://biblehub.com/commentaries/kad/ezekiel/3.htm) in having it refer
to the scroll just mentioned, i.e., "that." Textbook Hebrew would
demand הוא, but I thought it better to note the presence of a
demonstrative of some sort than just to leave out the word, as do NIV,
NLT, NET, and NRSV.