The worrying sighting comes as speculation mounts that the supermodel is set to leave her husband Justin Bieber after his troubling behaviour in public, including bizarre outbursts.
Hailey, 28, appeared glum as she stepped out in the West Village, putting her bare left hand — and very much empty ring finger — on show as she grabbed breakfast at The Commerce Inn.
Wearing a khaki trench coat and dark sunglasses, she looked tense as she climbed out of a black SUV outside the restaurant.
Paps caught Hailey keeping her left arm raised the entire time, making sure her naked ring finger was front and centre.
And as she brushed her hair back for the cameras, her left hand was once again on full display.
The £500,000 rock was nowhere to be seen — and it wasn’t just a one-off.
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That evening, the Rhode Beauty founder was out again, this time enjoying a girls’ night at Chez Fifi on the Upper East Side with model pals Camila Morrone and Suki Waterhouse.
Wearing a black leather coat, a high-neck top and flared jeans, she strode through the streets making sure photographers could see her left hand — and its missing ring — at every turn.
Hailey kept her left arm tucked across her chest as she crossed Lexington Avenue, before resting her bare ring finger on her hip for the cameras to catch.
The supermodel ensured her left hand stayed in full view all night — fuelling mounting rumours that her marriage to Justin could be on the rocks.
Talk of a split between the A-list couple has swirled for months after Justin’s concerning behaviour in public.
Earlier this week, the Sorry singer uploaded a string of cryptic posts, including a blurry black-and-white selfie in which he looked solemn.
In one troubling caption, Justin wrote: “Tired of transactional relationships. If I have to do something to be loved that’s not love”.