Sirotkin turned sharply to his left, narrowly avoiding Hamilton's Silver Arrows, before running over the grass on the exit of Turn 11.
Vettel said his weighbridge incident had happened because he was eager to get back to the pits.
"I think 18 was probably the best back in the day", added the 33-year-old.
With the drivers' championship decided at the last round in Mexico City and Lewis Hamilton taking his fifth world title, we rumble on to the Brazilian Grand Prix at Interlagos.
There was also a good case for investigating Hamilton after qualifying, but it seems the Mercedes driver has been let off.
In Russia, while leading, Bottas was called on to move aside for Hamilton, thereby allowing the Briton to consolidate his championship lead over Sebastian Vettel, a move that proved controversial in terms of the Finn and race fans, not to mention team orders being blatantly used just days after the sport agreed a multi-million deal to allow in-race live betting.
Hamilton's team mate Valtteri Bottas, who was on pole in Brazil a year ago, qualified third with Ferrari's Kimi Raikkonen fourth on an all-Finnish second row. "I haven't asked Valtteri, but I don't think he will want that".
One dead, multiple injured in Melbourne stabbing
Bourke Street also reopened on Saturday morning, and a Reuters reporter said there was an increased police presence in the area. Prime Minister Scott Morrison condemned the "evil and cowardly attack".
"I moved to the left and that was where he chose to go".
After Ferrari lost out big time with a qualifying tyre gamble in Japan, it seemed incredibly courageous to play chicken with the weather in Brazil.
"The stewards reviewed the video evidence from the on-board camera and pit lane CCTV, viewed team engine telemetry and heard from the driver of auto 5 (Sebastian Vettel) and team representative", a statement said.
"Obviously, along the way, something went wrong and we need to learn from it".
"I was making sure I had the gap but then all of a sudden I saw a vehicle coming at high speed and I was like: 'Oh my God". For most of the weekend, it has been Haas who have been "best of the rest" but it was Sauber's Marcus Ericsson - taking part in what's set to be his penultimate F1 race this weekend - who was the quicker of the midfield pack behind the top three teams. Toro Rosso's Brendon Hartley, who had high hopes this weekend with Honda's Spec 3 engine, also narrowly missed out (by 0.011s to be precise), while McLaren pair Fernando Alonso and Stoffel Vandoorne joined Williams' Lance Stroll in suffering the familiar fate of opening-segment elimination.
"Obviously with the weather going up and down, and the Ferraris being quick this weekend, I'm going with my engineer to get the vehicle in the best shape". He wasn't on a quick lap so I don't know what his thinking was. "I tried. The first sector was so good".
Vettel went on to progress through to Q2 and qualify second, after which he criticised the FIA for its "unfair" timing of the call.