From the White House’s transcript of remarks made by Presidents Obama and Medvedev in Singapore, here’s what Medvedev had to say about Iran:

Another topic we discussed with President Obama is Iran. Indeed, recently we’ve had a series of consultations where both parties participated. We have reached certain results, but I believe that, thanks to our joint efforts, this process did not stop, did not become a stumbling stone which is impossible to bypass. It is still underway. But nonetheless, we’re still not satisfied with the pace of advancement of the process.

And I hope that as a result of our joint efforts with Iran, we will be able to reach agreements we’ve anticipated earlier and Iranian program will be peaceful and will not raise as many questions as our countries and the international community has at the moment.  But to reach that, certain efforts are yet to be taken.

At the same time, as reasonable politicians, I hope we understand that any process must be terminant.  Negotiation process is not for the pleasure of the process itself, but it is done in order to reach practical, specific outcomes.  In this case, our goal is clear:  it is transparent, up-to-date, peaceful program — not a program that would raise questions or concerns from the international community.  We’re prepared to work further and I hope that our joint work will yield in positive results.  In case we fail, the other options remain on the table in order to move the process in a different direction.

Note the lack of discussion of potential consequences for Iran if the process ends without the P5+1 nations being satisfied that Iran’s nuclear program won’t generate a weapon. In September, following a meeting with Obama in New York, Medvedev for the first time discussed circumstances under which Russia would back multilateral economic sanctions against Iran. The White House hailed it as a victory of presidential engagement. Since then, Iran has acknowledged a previously-undisclosed nuclear facility at Qom and equivocated on an offer to enrich its uranium in Russia and France. And yet Medvedev declined to reiterate his potential support for a sanctions regime. An insignificant omission or a sign that P5+1 unity is fraying?

Update: In fairness, Helene Cooper, who’s traveling with Obama, read the reference to impatience as a sign of sanctions still being broached. And I guess that you could read Medvedev’s line “in case we fail, the other options remain on the table” as a sanctions reference. Still, I was struck by the lack of Medvedev’s reiterated explicit reference.