After P3X and P3 pro, the company has now announced Realme P3 Ultra 5G, which might come within the third week of March as an extension of the P series launched in February.
Realme P3 Ultra 5G Is Coming In The Indian Market The First Ultra Smartphone From The Company In The P Series
An official statement from Realme said, “With its promise of 'Ultra Design; Ultra Performance; Ultra Camera,' Realme P3 Ultra 5G brings an extraordinary fusion of style, speed, and superior imaging, without any compromises.”

Indications suggest an upgrade of the device over the P3 Pro with a slim and flat frame design as per the official announcement of the phone. Anticipation is going on regarding the specification of P3 ultra, however, any official confirmation from Realme is yet to come.
Expected specifications in P3 Ultra
Considering the 6.83-inch 1.5K curved AMOLED display of P3 Pro, the Ultra could feature a similar size of display or a little bigger in the ultra model with a higher resolution and refresh rate of up to 120 Hz.

Speculation suggests the presence of a MediaTek Dimensity 8300 chipset, paired with up to 12GB of LPDDR5X RAM in the phone, which could ensure a powerful performance. There might be a 6,000mAh battery with support for 80W wired charging, considering the previous model capacity of the P series.
Expected Camera
There is speculation regarding the camera setup consisting of a 50MP main lens and a supportive 5MP sensor. The presence of a 12 megapixel selfie camera is rumored for the phone, however, there is no glimpse in the posted photo regarding camera position. The phone might come this month, following the official announcement in the coming weeks.