Exhibit 99.3

Unaudited Pro Forma Condensed Combined Financial Information

The following unaudited pro forma condensed combined financial statements are based on the historical consolidated financial statements of The First Bancshares, Inc. (hereinafter referred to as the "Company" or "we" and similar terms unless the context indicates otherwise) and Iberville Bank ("Iberville") and are adjusted to give effect to the January 1, 2017 acquisition of Iberville. The unaudited pro forma condensed combined balance sheet as of December 31, 2016 gives effect to the acquisition of Iberville as if it had occurred on December 31, 2016. The unaudited pro forma condensed combined statements of operations for the year ended December 31, 2016 give effect to the acquisition of Iberville as if it had occurred on January 1, 2016.

The acquisition has been accounted for using the acquisition method of accounting in accordance with Accounting Standards Codification ("ASC") 805 - Business Combinations. Under the acquisition method of accounting, the total purchase consideration of the acquisition is allocated to the tangible assets and identifiable intangible assets and liabilities assumed based on their relative fair values. The excess of the purchase consideration over the net tangible and identifiable intangible assets is recorded as goodwill. The purchase price allocation is preliminary because valuation of the net tangible and identifiable intangible assets is still being finalized. Accordingly, the pro forma adjustments related to the purchase price allocation and certain other adjustments are preliminary and have been made solely for the purpose of preparing the unaudited pro forma condensed combined financial statements. The estimates and assumptions are subject to change during the measurement period (up to one year from the acquisition date).

The pro forma condensed combined financial statements do not necessarily reflect what the combined companies' financial condition or results of operations would have been had the acquisition occurred on the dates indicated. They also may not be useful in predicting the future financial condition and results of operations of the combined company. The actual financial position and results of operations may differ significantly from the pro forma amounts reflected herein due to a variety of factors.

The unaudited pro forma condensed combined financial statements have been prepared for illustrative purposes only and are not intended to represent or be indicative of the consolidated financial position or results of operations in future periods or the results that actually would have been achieved if the Company and Iberville had been a combined company during the period presented. The actual financial position and results of operations may differ significantly from the pro forma amounts reflected herein due to a variety of factors. The unaudited pro forma condensed combined statement of operations does not reflect any operating efficiencies and/or cost savings that the Company may achieve with respect to the combined companies.

These unaudited pro forma condensed combined financial statements should be read in conjunction with the Company's historical consolidated financial statements and accompanying notes included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2016, as well as Iberville's historical consolidated financial statements and related notes for the year ended December 31, 2016 which are included as Exhibit 99.2 to this Current Report filed on Form 8-K/A.

THE FIRST BANCSHARES, INC.

PRO FORMA CONDENSED COMBINED BALANCE SHEET

As of December 31, 2016

(in thousands)

(unaudited)

See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial Statements.

THE FIRST BANCSHARES, INC.

PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

For the year ended December 31, 2016

(in thousands, except per share data)

(unaudited)

See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial Statements.

THE FIRST BANCSHARES, INC.

NOTES TO UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

Note 1-Basis of Presentation

The unaudited pro forma condensed combined financial information included herein has been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission. Certain information and certain footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been omitted pursuant to such rules and regulations. However, management believes that the disclosures are adequate to make the information presented not misleading.

Note 2 – The Company’s Acquisition of Iberville Bank

On January 1, 2017, the Company completed a transaction in which it acquired all of the stock of Iberville Bank, Plaquemine, LA (“Iberville”) for a total consideration of $31.1 million pursuant to a previously-announced Stock Purchase Agreement entered into on October 12, 2017 among the Company and A. Wilbert’s Sons Lumber & Shingle Co., a Louisiana corporation. The following table summarizes the cash paid and the preliminary estimated fair values of the assets and the liabilities assumed as if the acquisition of Iberville occurred on December 31, 2016 (in thousands):

Note 3-Pro Forma Adjustments

The following pro forma adjustments have been reflected in the unaudited pro forma condensed combined financial information. All adjustments are based on current assumptions and valuations, which are subject to change: