Exhibit 99.3

 

本港投寄， 閣下無需支付郵費或貼上郵票。 www.computershare.com/hk/contact 香港  PETROCHINA COMPANY LIMITED (a joint stock limited company incorporated in the People’s Republic of China with limited liability) Stock Code 857 N O T I F I C AT I O N L E T T E R 19 September 2022 Dear Non-registered Holder (1), PetroChina Company Limited (the “Company”) – Notice of Publication of 2022 Interim Report (“Current Corporate Communications”) The English and Chinese versions of the Company’s Current Corporate Communication s are available on the Company’s website at www.petrochina.com.cn and the website of HKEXnews at www.hkexnews.hk. You may access the Current Corporate Communications by browsing through the Company’s website or the website of HKEXnews. If you want to receive a printed version of the Current Corporate Communication s, please complete the Request Form on the reverse side and return it to the Company c/o Hong Kong Registrars Limited (the “Hong Kong Share Registrar”) by using the mailing label at the bottom of the Request Form (no need to affix a stamp if posted in Hong Kong; otherwise, please affix an appropriate stamp). T he address of the Hong Kong Share Registrar is 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wan Chai, Hong Kong. The Request Form may also be downloaded from the Company’s website at www.petrochina.com.cn or the website of HKEXnews at www.hkexnews.hk. Should you have any queries relating to any of the above matters, please call the Company’s telephone hotline at (852) 2862 8688 during business hours from 9:00 a.m. to 6:00 p.m. from Monday to Friday, excluding public holidays or send a n email to PetroChina.ecom@computershare.com.hk. By order of the Board PetroChina Company Limited WANG Hua Company Secretary Note: (1) This letter is addressed to Non-registered Holders (“Non-registered Holder” means such person or company whose shares are held in The Central Clearing and Settlement System (CCASS) and who has notified the Company from time to time through Hong Kong Securities Clearing Company Limited to receive Corporate Communications). If you have sold or transferred your shares in the Company, please disregard this letter and the Request Form on the reverse side. (1) –2022 www.petrochina.com.cn www.hkexnews.hk ( ) 183 17M www.petrochina.com.cn www.hkexnews.hk 852 2862 8688 9 6 PetroChina.ecom@computershare.com.hk 2 0 2 2 9 1 9 (1) (“ ” ) PETH-19092022-1(0)

CCS2855 PETH_NRH Request Form 申請表格 To: PetroChina Company Limited (the “Company”) 致: 中國石油天然氣股份有限公司（「本公司」） (Stock Code: 857) （股份代號：857） c/o Hong Kong Registrars Limited 經香港證券登記有限公司 17M Floor, Hopewell Centre, 183 Queen’s Road East, 183 香港灣仔皇后大道東號合和中心 17M樓 Wan Chai, Hong Kong I/We have already received a printed copy of the Current Corporate Communications in Chinese/English or have chosen (or are deemed to have consented) to read the Current Corporate Communications posted on the Company’s website, I/We would like to receive another printed version of the Current Corporate Communications of the Company as indicated below: 本人／我們已收取本次公司通訊文件之中文／英文印刷本或已選擇（或被視為已同意）瀏覽本公司網站所登載之本次公司通訊文件，但現在希望以下列方式收取 貴公司本次公司通訊文件之另一語言印刷本： (Please mark ONLY ONE（X）of the following boxes) (請從下列選擇中，僅在其中一個空格內劃上「X」號) I/We would like to receive a printed copy in English now. 本人／我們現在希望收取一份英文印刷本。 I/We would like to receive a printed copy in Chinese now. 本人／我們現在希望收取一份中文印刷本。 I/We would like to receive both the printed English and Chinese copies now. 本人／我們現在希望收取英文和中文各一份印刷本。 Name(s) of Non-registered holder(s)# Signature # 非登記持有人姓名 簽名 (Please use ENGLISH BLOCK LETTERS 請用英文正楷填寫) Address# # 地址 (Please use ENGLISH BLOCK LETTERS 請用英文正楷填寫) Contact telephone number Date 聯絡電話號碼 日期 # You are required to fill in the details if you download this request form from the Company’s Website. 假如 閣下從公司網站下載本申請表格，請必須填上有關資料。 Notes附註 0 1. Please complete all your details clearly. 請 閣下清楚填妥所有資料。 2. If your shares are held in joint names, the shareholder whose name stands first on the register of members of the Company in respect of the joint holding should sign on this Request Form in order 1 to be valid. 如屬聯名股東，則本申請表格須由該名於本公司股東名冊上就聯名持有股份其姓名位列首位的股東簽署，方為有效。 3. Any form with more than one box marked (X), with no box marked (X), with no signature or otherwise incorrectly completed will be void. 如在本表格作出超過一項選擇、或未有作出選擇、或未有簽署、或在其他方面填寫不正確，則本表格將會作廢。 4. For the avoidance of doubt, we do not accept any other instructions written on this Request Form. 為免存疑，任何在本申請表格上的額外手寫指示，本公司將不予處理。 5. Please note that both printed English and Chinese versions of all the Company’s Corporate Communications which we have sent to our Shareholders in the past 12 months are available from the Company on request. They are also available on the Company’s website (www.petrochina.com.cn) for five years from the date of first publication. 本公司備有於過去 12個月曾寄發予股東的公司通訊文件的中、英文版印刷本。該等通訊文件亦由首次登載日期起計，持續 5年載於本公司網站(www.petrochina.com.cn)上。 19092022  Mailing Label郵寄標籤 Please cut the mailing label and stick it on an envelope Get in touch with us 與我們聯繫 to return this Request Form to us. Send us an enquiry 垂詢 Computershare Hong Kong Investor Services Limited Rate our service 評價 No postage is necessary if posted in Hong Kong. 香港中央證券登記有限公司 Lodge a complaint 投訴 Contact Us 聯繫我們 Freepost No. 簡便回郵號碼：37 當 閣下寄回本申請表格時，請將郵寄標籤剪貼於信封上。 Hong Kong 香港 如在本港投寄， 閣下無需支付郵費或貼上郵票。 www.computershare.com/hk/contact 